List all countries supported by the public holidays API.
AI agents call list_available_countries to retrieve information from Integrations MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a simple query operation that retrieves and returns a static list of supported countries from a public holidays API. It performs no modifications, executions, deletions, or financial transactions. The blast radius of misuse is minimal—an agent cannot cause harm by calling this tool, as it only reads publicly available metadata. Confidence is high because the name and description are explicit and unambiguous.
From the tool's definition Tool name 'list_available_countries' and description 'List all countries supported by the public holidays API' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all countries supported by the public holidays API. It is categorised as a Read tool in the Integrations MCP MCP Server, which means it retrieves data without modifying state.
Register the Integrations MCP server in PolicyLayer and add a rule for list_available_countries: 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 Integrations MCP. Nothing to install.
list_available_countries 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 list_available_countries 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 list_available_countries. 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.
list_available_countries is provided by the Integrations MCP server (shriram-vasudevan/integrations-mcp). 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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