Get details of a shortened URL by slug without incrementing clicks. Returns the URL record including estimatedTokensSaved — the per-substitution token saving if this slug is used in place of the full URL in future context. Only works for URLs you own.
AI agents call get_url to retrieve information from Url Shortener without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves metadata about a shortened URL resource (slug, URL record, token savings estimate) without modifying, deleting, or executing any operations. It explicitly does not increment click counters, confirming no state modification. Access is limited to 'URLs you own', providing ownership-based access control. This is a straightforward read/retrieval operation with minimal blast radius.
From the tool's definition Tool description states 'Get details of a shortened URL by slug without incrementing clicks' and 'Returns the URL record'. The phrase 'without incrementing clicks' and 'Get details' indicate a read-only retrieval operation with no side effects.
Attacks that exploit this kind of access
Get details of a shortened URL by slug without incrementing clicks. Returns the URL record including estimatedTokensSaved — the per-substitution token saving if this slug is used in place of the full URL in future context. Only works for URLs you own. It is categorised as a Read tool in the Url Shortener MCP Server, which means it retrieves data without modifying state.
Register the Url Shortener MCP server in PolicyLayer and add a rule for get_url: 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 Url Shortener. Nothing to install.
get_url 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 get_url 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 get_url. 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.
get_url is provided by the Url Shortener MCP server (michaelshumshum/url-shortener-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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