Low Risk

listar_barrios

Obtiene la lista de barrios/zonas disponibles, opcionalmente filtrados por municipio. Útil para búsquedas más específicas de ubicación.

Part of the La Palma 24 - Vacation Rentals server.

listar_barrios is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call listar_barrios to retrieve information from La Palma 24 - Vacation Rentals without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though listar_barrios only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "listar_barrios": {}
  }
}

See the full La Palma 24 - Vacation Rentals policy for all 6 tools.

Get this rule live on your own La Palma 24 - Vacation Rentals server in minutes. PolicyLayer enforces it on every call, before it runs.

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These attack patterns abuse exactly the kind of access listar_barrios gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so listar_barrios only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the listar_barrios tool do? +

Obtiene la lista de barrios/zonas disponibles, opcionalmente filtrados por municipio. Útil para búsquedas más específicas de ubicación.. It is categorised as a Read tool in the La Palma 24 - Vacation Rentals MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on listar_barrios? +

Register the La Palma 24 - Vacation Rentals MCP server in PolicyLayer and add a rule for listar_barrios: 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 La Palma 24 - Vacation Rentals. Nothing to install.

What risk level is listar_barrios? +

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

Can I rate-limit listar_barrios? +

Yes. Add a rate_limit block to the listar_barrios 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 listar_barrios completely? +

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

listar_barrios is provided by the La Palma 24 - Vacation Rentals MCP server (https://mcp.la-palma24.net). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every La Palma 24 - Vacation Rentals tool call.

Deterministic rules across all 6 La Palma 24 - Vacation Rentals tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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