search_contacts
AI agents call search_contacts to retrieve information from Zimbra MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves contact information without modifying, deleting, or executing external operations. It is a read-only query operation with minimal blast radius if misused by an agent—worst case is exposure of contact data the agent already has access to through the server.
From the tool's definition Tool name 'search_contacts' and server context indicate querying/retrieving contact data. Server description states it 'Supports searching' contacts. No description provided for this specific tool, but the name and context are clear.
Attacks that exploit this kind of access
search_contacts. It is categorised as a Read tool in the Zimbra MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Zimbra MCP Server MCP server in PolicyLayer and add a rule for search_contacts: 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 Zimbra MCP Server. Nothing to install.
search_contacts 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_contacts 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_contacts. 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_contacts is provided by the Zimbra MCP Server MCP server (jeremie-lesage/zimbra-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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