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Python: [Generated by SRE Agent] Fix MCP allowed_tools empty list handling (#6296)

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* Fix MCP allowed_tools empty list handling

When allowed_tools is set to an empty list [], the falsy check
'if not self.allowed_tools' incorrectly treats it as unconfigured
(same as None), causing all tools to be exposed. Change to an
explicit 'is None' check so that an empty list correctly results
in no tools being allowed.

Co-authored-by: Azure SRE Agent <noreply@microsoft.com>

* Clarify allowed_tools docstring: None vs [] semantics

Per Eduard's review on PR #6296: explicitly document that None exposes all tools and [] exposes none, across all four MCPTool / MCPStdioTool / MCPStreamableHTTPTool / MCPWebsocketTool docstrings.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* allowed_tools docstring: recommend load_tools=False for full disable

Per Eduard's follow-up on PR #6296: `load_tools=False` is the cleaner idiom when you don't want to expose any tools. Reframe `allowed_tools=[]` in the docstring as a runtime guard / inspection-only path and cross-reference `load_tools`.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Azure SRE Agent <noreply@microsoft.com>
Co-authored-by: Giles Odigwe <79032838+giles17@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit is contained in:
chetantoshniwal
2026-06-10 23:46:46 -07:00
committed by GitHub
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parent 3753d938f5
commit 4149f24791
2 changed files with 30 additions and 5 deletions
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python/packages/core/tests/core/test_mcp.py
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@@ -1530,6 +1530,7 @@ def test_mcp_tool_approval_mode_returns_none_for_unmatched_names() -> None:
3,
["tool_one", "tool_two", "tool_three"],
), # None means all tools are allowed
([], 0, []), # Empty list means no tools are allowed
(["tool_one"], 1, ["tool_one"]), # Only tool_one is allowed
(
["tool_one", "tool_three"],