Access Groups \u00b7 query roles. Variables: after, filter, first, notFilter, order. Example variables: {\
AI agents call roles 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.
This tool queries and retrieves role information from the GreyMatter platform without modifying, deleting, or executing external actions. It fits the Read category as it retrieves data with no side effects. The pagination and filtering parameters suggest a standard read query interface. Severity is low because querying roles poses minimal risk—it exposes information already available to authorized users.
From the tool's definition Tool name 'roles' with description 'query roles' and variables like 'after', 'filter', 'first', 'order' indicate a data retrieval operation. The 'query' keyword and pagination parameters ('after', 'first') are characteristic of read-only list/fetch operations.
Attacks that exploit this kind of access
Access Groups \u00b7 query roles. Variables: after, filter, first, notFilter, order. 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 roles: 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.
roles 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 roles 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 roles. 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.
roles 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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