diff --git a/index.ts b/index.ts
index a4536c4..6a97e05 100644
--- a/index.ts
+++ b/index.ts
@@ -43,12 +43,6 @@ const plugin: Plugin = (async (ctx) => {
     // Create tool tracker and load prompts for synthetic instruction injection
     const toolTracker = createToolTracker()
 
-    // Wire up tool name lookup from the cached tool parameters
-    toolTracker.getToolName = (callId: string) => {
-        const entry = state.toolParameters.get(callId.toLowerCase())
-        return entry?.tool
-    }
-
     const prompts = {
         synthInstruction: loadPrompt("synthetic"),
         nudgeInstruction: loadPrompt("nudge")
diff --git a/lib/fetch-wrapper/formats/bedrock.ts b/lib/fetch-wrapper/formats/bedrock.ts
index ea1396b..2aaedc6 100644
--- a/lib/fetch-wrapper/formats/bedrock.ts
+++ b/lib/fetch-wrapper/formats/bedrock.ts
@@ -1,4 +1,4 @@
-import type { FormatDescriptor, ToolOutput, ToolTracker } from "../types"
+import type { FormatDescriptor, ToolOutput } from "../types"
 import type { PluginState } from "../../state"
 
 function isNudgeMessage(msg: any, nudgeText: string): boolean {
@@ -30,36 +30,6 @@ function injectSynth(messages: any[], instruction: string, nudgeText: string): b
     return false
 }
 
-function trackNewToolResults(messages: any[], tracker: ToolTracker, protectedTools: Set<string>): number {
-    let newCount = 0
-    for (const m of messages) {
-        if (m.role === 'tool' && m.tool_call_id) {
-            if (!tracker.seenToolResultIds.has(m.tool_call_id)) {
-                tracker.seenToolResultIds.add(m.tool_call_id)
-                const toolName = tracker.getToolName?.(m.tool_call_id)
-                if (!toolName || !protectedTools.has(toolName)) {
-                    tracker.toolResultCount++
-                    newCount++
-                }
-            }
-        } else if (m.role === 'user' && Array.isArray(m.content)) {
-            for (const part of m.content) {
-                if (part.type === 'tool_result' && part.tool_use_id) {
-                    if (!tracker.seenToolResultIds.has(part.tool_use_id)) {
-                        tracker.seenToolResultIds.add(part.tool_use_id)
-                        const toolName = tracker.getToolName?.(part.tool_use_id)
-                        if (!toolName || !protectedTools.has(toolName)) {
-                            tracker.toolResultCount++
-                            newCount++
-                        }
-                    }
-                }
-            }
-        }
-    }
-    return newCount
-}
-
 function injectPrunableList(messages: any[], injection: string): boolean {
     if (!injection) return false
     messages.push({ role: 'user', content: injection })
@@ -90,10 +60,6 @@ export const bedrockFormat: FormatDescriptor = {
         return injectSynth(data, instruction, nudgeText)
     },
 
-    trackNewToolResults(data: any[], tracker: ToolTracker, protectedTools: Set<string>): number {
-        return trackNewToolResults(data, tracker, protectedTools)
-    },
-
     injectPrunableList(data: any[], injection: string): boolean {
         return injectPrunableList(data, injection)
     },
diff --git a/lib/fetch-wrapper/formats/gemini.ts b/lib/fetch-wrapper/formats/gemini.ts
index 8e2f569..c1c0feb 100644
--- a/lib/fetch-wrapper/formats/gemini.ts
+++ b/lib/fetch-wrapper/formats/gemini.ts
@@ -1,4 +1,4 @@
-import type { FormatDescriptor, ToolOutput, ToolTracker } from "../types"
+import type { FormatDescriptor, ToolOutput } from "../types"
 import type { PluginState } from "../../state"
 
 function isNudgeContent(content: any, nudgeText: string): boolean {
@@ -26,29 +26,6 @@ function injectSynth(contents: any[], instruction: string, nudgeText: string): b
     return false
 }
 
-function trackNewToolResults(contents: any[], tracker: ToolTracker, protectedTools: Set<string>): number {
-    let newCount = 0
-    let positionCounter = 0
-    for (const content of contents) {
-        if (!Array.isArray(content.parts)) continue
-        for (const part of content.parts) {
-            if (part.functionResponse) {
-                const positionId = `gemini_pos_${positionCounter}`
-                positionCounter++
-                if (!tracker.seenToolResultIds.has(positionId)) {
-                    tracker.seenToolResultIds.add(positionId)
-                    const toolName = part.functionResponse.name
-                    if (!toolName || !protectedTools.has(toolName)) {
-                        tracker.toolResultCount++
-                        newCount++
-                    }
-                }
-            }
-        }
-    }
-    return newCount
-}
-
 function injectPrunableList(contents: any[], injection: string): boolean {
     if (!injection) return false
     contents.push({ role: 'user', parts: [{ text: injection }] })
@@ -75,10 +52,6 @@ export const geminiFormat: FormatDescriptor = {
         return injectSynth(data, instruction, nudgeText)
     },
 
-    trackNewToolResults(data: any[], tracker: ToolTracker, protectedTools: Set<string>): number {
-        return trackNewToolResults(data, tracker, protectedTools)
-    },
-
     injectPrunableList(data: any[], injection: string): boolean {
         return injectPrunableList(data, injection)
     },
diff --git a/lib/fetch-wrapper/formats/openai-chat.ts b/lib/fetch-wrapper/formats/openai-chat.ts
index 141f03f..2ac3793 100644
--- a/lib/fetch-wrapper/formats/openai-chat.ts
+++ b/lib/fetch-wrapper/formats/openai-chat.ts
@@ -1,4 +1,4 @@
-import type { FormatDescriptor, ToolOutput, ToolTracker } from "../types"
+import type { FormatDescriptor, ToolOutput } from "../types"
 import type { PluginState } from "../../state"
 
 function isNudgeMessage(msg: any, nudgeText: string): boolean {
@@ -30,36 +30,6 @@ function injectSynth(messages: any[], instruction: string, nudgeText: string): b
     return false
 }
 
-function trackNewToolResults(messages: any[], tracker: ToolTracker, protectedTools: Set<string>): number {
-    let newCount = 0
-    for (const m of messages) {
-        if (m.role === 'tool' && m.tool_call_id) {
-            if (!tracker.seenToolResultIds.has(m.tool_call_id)) {
-                tracker.seenToolResultIds.add(m.tool_call_id)
-                const toolName = tracker.getToolName?.(m.tool_call_id)
-                if (!toolName || !protectedTools.has(toolName)) {
-                    tracker.toolResultCount++
-                    newCount++
-                }
-            }
-        } else if (m.role === 'user' && Array.isArray(m.content)) {
-            for (const part of m.content) {
-                if (part.type === 'tool_result' && part.tool_use_id) {
-                    if (!tracker.seenToolResultIds.has(part.tool_use_id)) {
-                        tracker.seenToolResultIds.add(part.tool_use_id)
-                        const toolName = tracker.getToolName?.(part.tool_use_id)
-                        if (!toolName || !protectedTools.has(toolName)) {
-                            tracker.toolResultCount++
-                            newCount++
-                        }
-                    }
-                }
-            }
-        }
-    }
-    return newCount
-}
-
 function injectPrunableList(messages: any[], injection: string): boolean {
     if (!injection) return false
     messages.push({ role: 'user', content: injection })
@@ -81,10 +51,6 @@ export const openaiChatFormat: FormatDescriptor = {
         return injectSynth(data, instruction, nudgeText)
     },
 
-    trackNewToolResults(data: any[], tracker: ToolTracker, protectedTools: Set<string>): number {
-        return trackNewToolResults(data, tracker, protectedTools)
-    },
-
     injectPrunableList(data: any[], injection: string): boolean {
         return injectPrunableList(data, injection)
     },
diff --git a/lib/fetch-wrapper/formats/openai-responses.ts b/lib/fetch-wrapper/formats/openai-responses.ts
index 549c56b..6b84891 100644
--- a/lib/fetch-wrapper/formats/openai-responses.ts
+++ b/lib/fetch-wrapper/formats/openai-responses.ts
@@ -1,4 +1,4 @@
-import type { FormatDescriptor, ToolOutput, ToolTracker } from "../types"
+import type { FormatDescriptor, ToolOutput } from "../types"
 import type { PluginState } from "../../state"
 
 function isNudgeItem(item: any, nudgeText: string): boolean {
@@ -30,23 +30,6 @@ function injectSynth(input: any[], instruction: string, nudgeText: string): bool
     return false
 }
 
-function trackNewToolResults(input: any[], tracker: ToolTracker, protectedTools: Set<string>): number {
-    let newCount = 0
-    for (const item of input) {
-        if (item.type === 'function_call_output' && item.call_id) {
-            if (!tracker.seenToolResultIds.has(item.call_id)) {
-                tracker.seenToolResultIds.add(item.call_id)
-                const toolName = tracker.getToolName?.(item.call_id)
-                if (!toolName || !protectedTools.has(toolName)) {
-                    tracker.toolResultCount++
-                    newCount++
-                }
-            }
-        }
-    }
-    return newCount
-}
-
 function injectPrunableList(input: any[], injection: string): boolean {
     if (!injection) return false
     input.push({ type: 'message', role: 'user', content: injection })
@@ -68,10 +51,6 @@ export const openaiResponsesFormat: FormatDescriptor = {
         return injectSynth(data, instruction, nudgeText)
     },
 
-    trackNewToolResults(data: any[], tracker: ToolTracker, protectedTools: Set<string>): number {
-        return trackNewToolResults(data, tracker, protectedTools)
-    },
-
     injectPrunableList(data: any[], injection: string): boolean {
         return injectPrunableList(data, injection)
     },
diff --git a/lib/fetch-wrapper/handler.ts b/lib/fetch-wrapper/handler.ts
index cd9b683..8874e32 100644
--- a/lib/fetch-wrapper/handler.ts
+++ b/lib/fetch-wrapper/handler.ts
@@ -67,9 +67,11 @@ export async function handleFormat(
     let modified = false
 
     // Sync tool parameters from OpenCode's session API (single source of truth)
+    // Also tracks new tool results for nudge injection
     const sessionId = ctx.state.lastSeenSessionId
+    const protectedSet = new Set(ctx.config.protectedTools)
     if (sessionId) {
-        await syncToolParametersFromOpenCode(ctx.client, sessionId, ctx.state, ctx.logger)
+        await syncToolParametersFromOpenCode(ctx.client, sessionId, ctx.state, ctx.toolTracker, protectedSet, ctx.logger)
     }
 
     if (ctx.config.strategies.onTool.length > 0) {
@@ -91,8 +93,6 @@ export async function handleFormat(
             )
 
             if (prunableList) {
-                const protectedSet = new Set(ctx.config.protectedTools)
-                format.trackNewToolResults(data, ctx.toolTracker, protectedSet)
                 const includeNudge = ctx.config.nudge_freq > 0 && ctx.toolTracker.toolResultCount > ctx.config.nudge_freq
 
                 const endInjection = buildEndInjection(prunableList, includeNudge)
@@ -119,14 +119,12 @@ export async function handleFormat(
     }
 
     const toolOutputs = format.extractToolOutputs(data, ctx.state)
-    const protectedToolsLower = new Set(ctx.config.protectedTools.map(t => t.toLowerCase()))
     let replacedCount = 0
     let prunableCount = 0
 
     for (const output of toolOutputs) {
-        if (output.toolName && protectedToolsLower.has(output.toolName.toLowerCase())) {
-            continue
-        }
+        // Skip tools not in cache (protected tools are excluded from cache)
+        if (!output.toolName) continue
         prunableCount++
 
         if (allPrunedIds.has(output.id)) {
diff --git a/lib/fetch-wrapper/tool-tracker.ts b/lib/fetch-wrapper/tool-tracker.ts
index 4048925..639b99b 100644
--- a/lib/fetch-wrapper/tool-tracker.ts
+++ b/lib/fetch-wrapper/tool-tracker.ts
@@ -2,7 +2,6 @@ export interface ToolTracker {
     seenToolResultIds: Set<string>
     toolResultCount: number  // Tools since last prune
     skipNextIdle: boolean
-    getToolName?: (callId: string) => string | undefined
 }
 
 export function createToolTracker(): ToolTracker {
diff --git a/lib/fetch-wrapper/types.ts b/lib/fetch-wrapper/types.ts
index c7ebc68..7ea1f83 100644
--- a/lib/fetch-wrapper/types.ts
+++ b/lib/fetch-wrapper/types.ts
@@ -14,7 +14,6 @@ export interface FormatDescriptor {
     detect(body: any): boolean
     getDataArray(body: any): any[] | undefined
     injectSynth(data: any[], instruction: string, nudgeText: string): boolean
-    trackNewToolResults(data: any[], tracker: ToolTracker, protectedTools: Set<string>): number
     injectPrunableList(data: any[], injection: string): boolean
     extractToolOutputs(data: any[], state: PluginState): ToolOutput[]
     replaceToolOutput(data: any[], toolId: string, prunedMessage: string, state: PluginState): boolean
diff --git a/lib/state/tool-cache.ts b/lib/state/tool-cache.ts
index 8d2f8b2..b29d0d6 100644
--- a/lib/state/tool-cache.ts
+++ b/lib/state/tool-cache.ts
@@ -1,5 +1,6 @@
 import type { PluginState, ToolStatus } from "./index"
 import type { Logger } from "../logger"
+import type { ToolTracker } from "../fetch-wrapper/tool-tracker"
 
 /** Maximum number of entries to keep in the tool parameters cache */
 const MAX_TOOL_CACHE_SIZE = 500
@@ -13,6 +14,8 @@ export async function syncToolParametersFromOpenCode(
     client: any,
     sessionId: string,
     state: PluginState,
+    tracker?: ToolTracker,
+    protectedTools?: Set<string>,
     logger?: Logger
 ): Promise<void> {
     try {
@@ -36,8 +39,17 @@ export async function syncToolParametersFromOpenCode(
 
                 const id = part.callID.toLowerCase()
 
-                // Skip if already cached (optimization)
+                // Track tool results for nudge injection
+                if (tracker && !tracker.seenToolResultIds.has(id)) {
+                    tracker.seenToolResultIds.add(id)
+                    // Only count non-protected tools toward nudge threshold
+                    if (!part.tool || !protectedTools?.has(part.tool)) {
+                        tracker.toolResultCount++
+                    }
+                }
+
                 if (state.toolParameters.has(id)) continue
+                if (part.tool && protectedTools?.has(part.tool)) continue
 
                 const status = part.state?.status as ToolStatus | undefined
                 state.toolParameters.set(id, {
@@ -55,8 +67,7 @@ export async function syncToolParametersFromOpenCode(
         if (logger && synced > 0) {
             logger.debug("tool-cache", "Synced tool parameters from OpenCode", {
                 sessionId: sessionId.slice(0, 8),
-                synced,
-                totalCached: state.toolParameters.size
+                synced
             })
         }
     } catch (error) {