feat(beta): add ToolPolicyMiddleware for tool access control#2533
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amabito wants to merge 2 commits intoag2ai:mainfrom
Open
feat(beta): add ToolPolicyMiddleware for tool access control#2533amabito wants to merge 2 commits intoag2ai:mainfrom
amabito wants to merge 2 commits intoag2ai:mainfrom
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Single-responsibility middleware that blocks disallowed tool calls based on configurable allow/block lists. Extracted from GovernanceMiddleware to align with beta v2 composable middleware design. - ToolPolicyConfig: blocked_tools, allowed_tools - blocked_tools overrides allowed_tools - allowed_tools=None means no restriction, [] means deny all - Immutable config (lists frozen to tuples)
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Why are these changes needed?
Pulls the tool allow/block list logic out of GovernanceMiddleware (#2501,
closed) into its own middleware. Sits on
on_tool_execution, checks thetool name against blocked and allowed lists, returns ToolErrorEvent if denied.
blocked_tools overrides allowed_tools. allowed_tools=None means no
restriction; allowed_tools=[] means deny all. Config is frozen after
construction.
Related issue number
Replaces the tool policy portion of #2501 (closed).
Related: #2531 (BudgetMiddleware), #2532 (CircuitBreakerMiddleware).
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