List all diagrams created in this session.
AI agents call list_diagrams to retrieve information from Flowchart MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing diagrams without modifying, deleting, or executing any operations. It is a simple enumeration/listing function characteristic of Read category tools. The low severity reflects minimal blast radius even if misused by an AI agent, as it only exposes metadata about diagrams in the current session.
From the tool's definition Tool name is 'list_diagrams' and description states 'List all diagrams created in this session' - a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all diagrams created in this session. It is categorised as a Read tool in the Flowchart MCP MCP Server, which means it retrieves data without modifying state.
Register the Flowchart MCP server in PolicyLayer and add a rule for list_diagrams: 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 Flowchart MCP. Nothing to install.
list_diagrams 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 list_diagrams 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 list_diagrams. 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.
list_diagrams is provided by the Flowchart MCP server (zafer-liu/flowchart_mcp). 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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