new: MCP env variables referenced in agents will be set from environment value if found and not already set

Author: evilsocket

nerve/tools/mcp/client.py

@@ -1,3 +1,4 @@
+import os
 import typing as t
 from contextlib import AsyncExitStack, asynccontextmanager
 
@@ -13,6 +14,13 @@ class Client:
     name: str = ""
 
     def __init__(self, name: str, server: Configuration.MCPServer):
+        for key, value in server.env.items():
+            if not value:
+                env_val = os.getenv(key)
+                if env_val:
+                    logger.debug("setting {} from env", key)
+                    server.env[key] = env_val
+
         self.name = name
         self.server = server
         self.server_params = StdioServerParameters(command=server.command, args=server.args, env=server.env)

nerve/tools/mcp/compiler.py

@@ -122,7 +122,7 @@ async def get_tools_from_mcp(name: str, server: Configuration.MCPServer) -> list
     for mcp_tool in mpc_tools:
         func_body, type_defs = await create_function_body(client, mcp_tool)
 
-        print(func_body)
+        # print(func_body)
         exec(func_body, type_defs)
 
         tool_fn = wrap_tool_function(type_defs[mcp_tool.name])