API Keys \u00b7 query apiKeys. Variables: after, filter, first, order, after1, filter1, first1, order1, after2, filter2, first2, order2, user. Example variables: {\
AI agents call api_keys to retrieve information from ReliaQuest GreyMatter MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
While this is a Read operation (querying/retrieving data), it has high severity because API keys are sensitive credentials. An AI agent gaining access to API keys through this query could use them for unauthorized API calls, privilege escalation, or lateral movement. The blast radius extends beyond simple data retrieval to credential exposure, justifying 'high' severity rather than 'low' despite the Read category.
From the tool's definition Tool name is 'api_keys' and description indicates it 'query apiKeys' with filter and pagination parameters. This retrieves API key data from the GreyMatter platform.
Attacks that exploit this kind of access
API Keys \u00b7 query apiKeys. Variables: after, filter, first, order, after1, filter1, first1, order1, after2, filter2, first2, order2, user. Example variables: {\. It is categorised as a Read tool in the ReliaQuest GreyMatter MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ReliaQuest GreyMatter MCP Server MCP server in PolicyLayer and add a rule for api_keys: 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 ReliaQuest GreyMatter MCP Server. Nothing to install.
api_keys 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 api_keys 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 api_keys. 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.
api_keys is provided by the ReliaQuest GreyMatter MCP Server MCP server (space-c0wboy/reliaquest-greymatter-mcp-server). 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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