Reference Lists \u00b7 query referenceList. Variables: after, filter, first, order, after1, filter1, first1, order1, after2, filter2, first2, order2, after3, columnSelector, filter3, first3, order3, after4, filter4, first4, order4, after5, filter5, first5, order5, after6, filter6, first6, order6,...
AI agents call reference_list 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 retrieves reference list data from the ReliaQuest GreyMatter platform using GraphQL query parameters. The presence of pagination (after, first), ordering, filtering, and a selection parameter (columnSelector) are standard query patterns for data retrieval without modification.
From the tool's definition Tool name 'reference_list' combined with description stating 'query referenceList' with pagination parameters (after, first, order) and filtering options (filter) indicates a read-only query operation. No mutation or write operations are mentioned.
Attacks that exploit this kind of access
Reference Lists \u00b7 query referenceList. Variables: after, filter, first, order, after1, filter1, first1, order1, after2, filter2, first2, order2, after3, columnSelector, filter3, first3, order3, after4, filter4, first4, order4, after5, filter5, first5, order5, after6, filter6, first6, order6, id. 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 reference_list: 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.
reference_list 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 reference_list 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 reference_list. 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.
reference_list 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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