get_cptec_capitals_weather

THE RISK

Low Risk

Why get_cptec_capitals_weather needs a policy

This tool retrieves public weather data for Brazilian state capitals without modifying, executing, or deleting anything. It is a straightforward read operation with minimal security risk. The low severity reflects that misuse would only expose or retrieve weather information, causing no harm to systems or data.

From the tool's definition Tool name and description indicate 'Get current weather conditions' — a data retrieval operation with no side effects. The verb 'Get' and the phrase 'current weather conditions' explicitly describe a read-only query action.

Documented attack patterns abuse exactly the kind of access get_cptec_capitals_weather gives an agent:

POLICY

How to control get_cptec_capitals_weather

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Afip, and nothing reaches the server without passing your rules. This is the rule we recommend for get_cptec_capitals_weather:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_cptec_capitals_weather": {}
  }
}

get_cptec_capitals_weather is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Mcp Afip — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about get_cptec_capitals_weather

What does the get_cptec_capitals_weather tool do? +

Get current weather conditions for all Brazilian state capitals. It is categorised as a Read tool in the Mcp Afip MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_cptec_capitals_weather? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for get_cptec_capitals_weather: 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 Afip. Nothing to install.

What risk level is get_cptec_capitals_weather? +

get_cptec_capitals_weather is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_cptec_capitals_weather? +

Yes. Add a rate_limit block to the get_cptec_capitals_weather 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.

How do I block get_cptec_capitals_weather completely? +

Set action: deny in the PolicyLayer policy for get_cptec_capitals_weather. 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.

What MCP server provides get_cptec_capitals_weather? +

get_cptec_capitals_weather is provided by the Mcp Afip MCP server (codespar/mcp-dev-latam). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Afip tool call.

Start from Mcp Afip, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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