AI agents call search_notes to retrieve information from EspoCRM-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries existing notes/comments data without creating, modifying, or deleting records. It performs a read-only search operation with no side effects beyond data retrieval.
From the tool's definition Tool name 'search_notes' and description 'Search for notes/comments across entities' indicate a query operation with no modification or deletion capabilities.
Documented attack patterns abuse exactly the kind of access search_notes gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and EspoCRM-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for search_notes:
{
"version": "1",
"default": "deny",
"tools": {
"search_notes": {}
}
}search_notes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Search for notes/comments across entities. It is categorised as a Read tool in the EspoCRM-MCP MCP Server, which means it retrieves data without modifying state.
Register the EspoCRM- MCP server in PolicyLayer and add a rule for search_notes: 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 EspoCRM-MCP. Nothing to install.
search_notes 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_notes 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_notes. 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_notes is provided by the EspoCRM- MCP server (zaphod-black/espomcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 46 EspoCRM-MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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46 EspoCRM-MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.