Get comprehensive summary of the knowledge graph structure.
AI agents call get_graph_summary to retrieve information from Faulkner DB without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation—it retrieves and summarizes existing data from the knowledge graph. There are no side effects, data modifications, deletions, or external command executions. The blast radius of misuse is minimal, as an AI agent could at worst retrieve metadata about the knowledge graph structure without causing harm. Classification as Read is appropriate.
From the tool's definition Tool name 'get_graph_summary' and description 'Get comprehensive summary of the knowledge graph structure' indicate a retrieval operation that returns aggregate information about the graph without modification, deletion, or execution of arbitrary operations.
Attacks that exploit this kind of access
Get comprehensive summary of the knowledge graph structure. It is categorised as a Read tool in the Faulkner DB MCP Server, which means it retrieves data without modifying state.
Register the Faulkner DB MCP server in PolicyLayer and add a rule for get_graph_summary: 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 Faulkner DB. Nothing to install.
get_graph_summary 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_graph_summary 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_graph_summary. 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_graph_summary is provided by the Faulkner DB MCP server (platano78/faulkner-db). 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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