Prompt for visualizing the knowledge graph schema using a Mermaid class diagram.
AI agents call visualize_schema to retrieve information from MCP Server Proto-OKN without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool reads and visualizes existing schema information from the knowledge graph. It has no side effects—it neither modifies data, executes arbitrary code, deletes anything, nor triggers financial transactions. The output is a visualization artifact (Mermaid diagram) generated from schema queries.
From the tool's definition Tool description states it provides a 'Prompt for visualizing the knowledge graph schema using a Mermaid class diagram.' This is a retrieval and display operation that queries schema metadata and renders it as a diagram.
Attacks that exploit this kind of access
Prompt for visualizing the knowledge graph schema using a Mermaid class diagram. It is categorised as a Read tool in the MCP Server Proto-OKN MCP Server, which means it retrieves data without modifying state.
Register the MCP Server Proto-OKN MCP server in PolicyLayer and add a rule for visualize_schema: 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 MCP Server Proto-OKN. Nothing to install.
visualize_schema 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 visualize_schema 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 visualize_schema. 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.
visualize_schema is provided by the MCP Server Proto-OKN MCP server (sbl-sdsc/mcp-proto-okn). 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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