Lightweight heuristic chart recommender for a small data sample (1-5 rows) with capability filtering (push API, linked hover, SSR, selection, legend). Returns ranked recommendations with example props. For richer capability-descriptor ranking (scores, reasons, caveats) and the full 13-intent taxo...
AI agents call suggestChart to retrieve information from Semiotic without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool analyzes input data and returns recommendations—a pure read operation with no side effects. It does not modify data, execute code, delete anything, or commit financial transactions. The 'capability filtering' parameters are inputs for the recommendation logic, not commands that trigger external state changes.
From the tool's definition Tool description states it 'Returns ranked recommendations' and is a 'chart recommender' that processes a 'small data sample' with no mention of modifying, deleting, or executing external operations.
Attacks that exploit this kind of access
Lightweight heuristic chart recommender for a small data sample (1-5 rows) with capability filtering (push API, linked hover, SSR, selection, legend). Returns ranked recommendations with example props. For richer capability-descriptor ranking (scores, reasons, caveats) and the full 13-intent taxonomy, prefer. It is categorised as a Read tool in the Semiotic MCP Server, which means it retrieves data without modifying state.
Register the Semiotic MCP server in PolicyLayer and add a rule for suggestChart: 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 Semiotic. Nothing to install.
suggestChart 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 suggestChart 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 suggestChart. 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.
suggestChart is provided by the Semiotic MCP server (semiotic). 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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