This record as markdown: /tools/io-github-devopam-mcpg/describe-property-graph.md
What describe_property_graph does on Mcpg
AI agents call describe_property_graph to retrieve information from Mcpg without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why describe_property_graph is rated Low
The tool name implies a read-only inspection operation to retrieve information about property graph properties or structure. While the description is empty (lowering confidence), the verb 'describe' combined with a property graph context strongly suggests a non-destructive query operation. No evidence of write, execute, delete, or financial operations.
From the tool's definition Tool name 'describe_property_graph' suggests querying or retrieving metadata/schema information about a property graph structure. The 'describe' verb typically indicates introspection without modification.
Attacks that exploit this kind of access
The rule that runs describe_property_graph safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Mcpg, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For describe_property_graph, this is the rule to start with:
describe_property_graph is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Mcpg, apply this rule, and every describe_property_graph call is checked against it from then on.
Questions about describe_property_graph
describe_property_graph is a read tool on the Mcpg MCP server. It is categorised as a Read tool in the Mcpg MCP Server, which means it retrieves data without modifying state.
Register the Mcpg MCP server in PolicyLayer and add a rule for describe_property_graph: 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 Mcpg. Nothing to install.
describe_property_graph 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 describe_property_graph 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 describe_property_graph. 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.
describe_property_graph is provided by the Mcpg MCP server (pypi:mcpg). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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