AI agents call plot_chart to retrieve information from Mcp Bcrp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Based on the server context (macroeconomic data from BCRP) and the tool name 'plot_chart', this tool likely generates/renders a chart from time-series data — a read/display operation with no side effects. However, the empty description lowers confidence. Generating a chart is at most a Read operation (fetching and visualizing data). Severity is low as misuse would at worst produce misleading charts.
From the tool's definition Tool name is 'plot_chart'; description is empty or uninformative.
Attacks that exploit this kind of access
plot_chart. It is categorised as a Read tool in the Mcp Bcrp MCP Server, which means it retrieves data without modifying state.
Register the Mcp Bcrp MCP server in PolicyLayer and add a rule for plot_chart: 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 Bcrp. Nothing to install.
plot_chart 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 plot_chart 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 plot_chart. 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.
plot_chart is provided by the Mcp Bcrp MCP server (maykolmedrano/mcp_bcrp). 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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