feat(core): protocol and wire transport support for secure parameters - #775
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nit: Small description/code mismatch: the description says we advertise {"secure_parameters": True} but the code sends {}. |
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Updated. Thanks for catching that! |
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Description
Implements the protocol and wire transport layer for Secure Parameters (
com.google.cloud/toolbox.v1) in core package, per MCP SEP-2243.This change enables MCP client capabilities advertisement, discovery parsing of
secureInputSchema, and serialization ofsecureArgumentsduring tool execution in MCP protocolv2026-07-28.Changes
extensions["com.google.cloud/toolbox.v1"] = {}during MCP initialization.ToolSchemato parsesecureInputSchemaintosecure_parameters: list[ParameterSchema]duringtools/list.secure_arguments(serialization_alias="secureArguments") toCallToolRequestParams.ITransport.tool_invoke()to acceptsecure_arguments: Optional[Mapping[str, Any]] = None.NotImplementedErroracross legacy transports (v20241105,v20250326,v20250618,v20251125) if non-emptysecure_argumentsis passed.secureInputSchemadiscovery parsing, and wire-levelsecureArgumentsJSON payload formatting.test_v20241105.py,test_v20250326.py,test_v20250618.py, andtest_v20251125.pyassertingNotImplementedError.