AI agents call list_charts to retrieve information from AI Charts without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about charts within a project namespace. It is purely informational—no data is created, modified, deleted, or executed. The operation is idempotent and safe. Classification as Read is appropriate, with low severity because disclosing a list of available charts poses minimal risk unless the project contains sensitive naming conventions, but typical usage carries negligible blast radius.
From the tool's definition The tool name 'list_charts' and description 'List all charts in a project' indicate a retrieval operation with no side effects. It queries existing data without modification, deletion, or execution.
Attacks that exploit this kind of access
List all charts in a project. It is categorised as a Read tool in the AI Charts MCP Server, which means it retrieves data without modifying state.
Register the AI Charts MCP server in PolicyLayer and add a rule for list_charts: 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 AI Charts. Nothing to install.
list_charts 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_charts 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_charts. 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_charts is provided by the AI Charts MCP server (tjameswilliams/ai-charts). 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.
Teams ship this data inside their own products. See what a licence covers →