toolkit-mcp-server: geolocate IP

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With readOnlyHint=true and destructiveHint=false already in annotations, the bar is lower, yet the description still adds real context: the provider is called directly (never the target), so it is safe on untrusted input; accuracy is provider-bounded; behavior on private/reserved ranges is stated; proxy/VPN/mobile flags are defined as reliability warnings; and the source field is disclosed. Nothing contradicts the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

All four sentences are substantive and the operation is stated up front in the first sentence, with caveats and security notes after. No filler. Minor redundancy between 'accuracy is best-effort' and 'VPNs, proxies, anycast...' slightly thins the density, but nothing is wasted.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a single-param, read-only tool whose output is not schema-described, the description covers: the input types, DNS resolution behavior, the output fields, the meaning of proxy/mobile flags for reliability, and failure modes (private ranges rejected). An agent has everything needed to call it correctly and interpret the result.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% (the single param is fully defined with three alternates: IPv4, IPv6, hostname). The description adds value beyond the schema by stating that hostnames are DNS-resolved first and that the resolved address is echoed in the response — behavior the schema cannot express. Slightly more caveat detail (e.g., punycode) would push to 5, but coverage is already high.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The first sentence states a clear verb-resource pair — resolve a public IP or hostname to a set of geographic and network metadata — and enumerates every returned field, so an agent immediately knows what it does and what it returns. It also carves out scope (public only) that distinguishes it in a toolkit whose other tools are QR, hash, and weather related.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explains when results are reliable and when they are not (VPNs, proxies, anycast, mobile NAT, reserved ranges), which is implicit guidance to the caller on trusting the output. It does not explicitly contrast with a sibling geolocation alternative, but the sibling set contains no competing tool, so a 4 is appropriate rather than a 5.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.