Search Google Contacts by name, email, or phone number.
AI agents call contacts_search to retrieve information from Mariana Google MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves contact information based on search criteria without any side effects. It performs a read-only query against the user's contacts database. No data is created, modified, or deleted. This is the lowest-risk category.
From the tool's definition Tool name is 'contacts_search' and description states it 'Search[es] Google Contacts by name, email, or phone number.' This is a query operation with no modification, creation, or deletion of data.
Attacks that exploit this kind of access
Search Google Contacts by name, email, or phone number. It is categorised as a Read tool in the Mariana Google MCP MCP Server, which means it retrieves data without modifying state.
Register the Mariana Google MCP server in PolicyLayer and add a rule for contacts_search: 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 Mariana Google MCP. Nothing to install.
contacts_search 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 contacts_search 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 contacts_search. 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.
contacts_search is provided by the Mariana Google MCP server (marianasmall/mariana-google-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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