Retrieve a contact by ID from SparrowDesk
AI agents call get_contact to retrieve information from SparrowDesk without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple read operation to fetch contact information. It has no capacity to modify, delete, or execute operations. The blast radius is minimal as it only returns existing contact data.
From the tool's definition The tool description explicitly states 'Retrieve a contact by ID from SparrowDesk', which is a query operation that retrieves data without modification or side effects.
Attacks that exploit this kind of access
Retrieve a contact by ID from SparrowDesk. It is categorised as a Read tool in the SparrowDesk MCP Server, which means it retrieves data without modifying state.
Register the SparrowDesk MCP server in PolicyLayer and add a rule for get_contact: 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 SparrowDesk. Nothing to install.
get_contact 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 get_contact 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 get_contact. 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.
get_contact is provided by the SparrowDesk MCP server (sparrowdesk/sparrowdesk-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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