search_documents_by_metadata
AI agents call search_documents_by_metadata to retrieve information from Sample MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Despite the empty description, the tool name 'search_documents_by_metadata' and the pattern of sibling tools all indicate this performs a search/query operation that retrieves data without side effects. No evidence of creation, modification, deletion, execution, or financial operations. Confidence is slightly reduced due to missing description, but the naming and server context provide strong signals.
From the tool's definition Tool name contains 'search' and 'metadata'; sibling tools on the server (get_all_documents, get_document_count, search_documents, search_documents_semantic) are all read-only retrieval operations.
Attacks that exploit this kind of access
search_documents_by_metadata. It is categorised as a Read tool in the Sample MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Sample MCP Server MCP server in PolicyLayer and add a rule for search_documents_by_metadata: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Sample MCP Server. Nothing to install.
search_documents_by_metadata is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the search_documents_by_metadata rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for search_documents_by_metadata. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
search_documents_by_metadata is provided by the Sample MCP Server MCP server (satinath-nit/sample-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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