Get a list of all contact groups
AI agents call get_contact_groups to retrieve information from macOS MCP Servers without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries contact group information from the macOS Contacts application and returns a list. It performs no side effects, creates no data, modifies nothing, executes no commands, and deletes nothing. It is a straightforward read operation with minimal security impact—contact group names are generally non-sensitive metadata. Even if an AI agent calls this tool unnecessarily or repeatedly, no harm results.
From the tool's definition Tool name 'get_contact_groups' and description 'Get a list of all contact groups' indicate a retrieval operation with no modification or deletion of data.
Attacks that exploit this kind of access
Get a list of all contact groups. It is categorised as a Read tool in the macOS MCP Servers MCP Server, which means it retrieves data without modifying state.
Register the macOS MCP Servers MCP server in PolicyLayer and add a rule for get_contact_groups: 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 macOS MCP Servers. Nothing to install.
get_contact_groups 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_groups 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_groups. 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_groups is provided by the macOS MCP Servers MCP server (tdisawas0github/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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