AI agents call search_multiple to retrieve information from Fathom without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool searches documents within local collections, which is a read-only retrieval operation with no side effects. The naming convention and context from sibling tools (find_document, read_document, get_document_info) all suggest data querying without modification.
From the tool's definition Tool name 'search_multiple' and sibling tool 'search_documents' both indicate querying/searching operations. The server description emphasizes 'full-text search' as a core capability.
Attacks that exploit this kind of access
search_multiple. It is categorised as a Read tool in the Fathom MCP Server, which means it retrieves data without modifying state.
Register the Fathom MCP server in PolicyLayer and add a rule for search_multiple: 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 Fathom. Nothing to install.
search_multiple 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_multiple 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_multiple. 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_multiple is provided by the Fathom MCP server (romanshnurov/fathom-mcp). 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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