get_cptec_ocean_forecast

THE RISK

Low Risk

Why get_cptec_ocean_forecast needs a policy

This tool retrieves weather/ocean forecast data from CPTEC/INPE (Brazilian meteorological service). It queries and returns information without modifying, deleting, or executing any operations. Despite being on an AFIP (Argentine tax authority) server, this particular tool is a straightforward data retrieval function. No financial transactions, destructive actions, or code execution are involved.

From the tool's definition Tool name is 'get_cptec_ocean_forecast' and description states 'Get ocean/wave forecast for a coastal city'. The verb 'Get' and action of retrieving forecast data indicates a read-only query operation with no side effects.

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

POLICY

How to control get_cptec_ocean_forecast

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_ocean_forecast:

policy.json

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

get_cptec_ocean_forecast 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_ocean_forecast

What does the get_cptec_ocean_forecast tool do? +

Get ocean/wave forecast for a coastal city (CPTEC/INPE). 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_ocean_forecast? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for get_cptec_ocean_forecast: 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_ocean_forecast? +

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

Can I rate-limit get_cptec_ocean_forecast? +

Yes. Add a rate_limit block to the get_cptec_ocean_forecast 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_ocean_forecast completely? +

Set action: deny in the PolicyLayer policy for get_cptec_ocean_forecast. 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_ocean_forecast? +

get_cptec_ocean_forecast 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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