AI agents call graph_info to retrieve information from Graph Tool Call without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns information about an internal graph structure (summary statistics). It performs no side effects, creates no data, executes no external commands, and poses minimal risk. It is a read-only informational operation.
From the tool's definition Tool name 'graph_info' and description 'Show summary statistics about the loaded tool graph' indicate retrieval and display of metadata without modification or execution of other operations.
Documented attack patterns abuse exactly the kind of access graph_info gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Graph Tool Call, and nothing reaches the server without passing your rules. This is the rule we recommend for graph_info:
{
"version": "1",
"default": "deny",
"tools": {
"graph_info": {}
}
}graph_info is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Show summary statistics about the loaded tool graph. It is categorised as a Read tool in the Graph Tool Call MCP Server, which means it retrieves data without modifying state.
Register the Graph Tool Call MCP server in PolicyLayer and add a rule for graph_info: 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 Graph Tool Call. Nothing to install.
graph_info 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 graph_info 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 graph_info. 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.
graph_info is provided by the Graph Tool Call MCP server (sonaiengine/graph-tool-call). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Graph Tool Call, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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7 Graph Tool Call tools catalogued and risk-classified — across an index of 43,000+ MCP servers.