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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered and the description correctly doesn't contradict it. The description adds real value by disclosing the shape of the returned card (install line, version, license, warnings, rules, docs, Gid Score, downloads, alternatives), which partly compensates for the missing output schema, but it says nothing about failure behavior for unknown slugs or data freshness.

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?

The core statement is front-loaded and correct, but the rest is a single sprawling sentence with a long parenthetical laundry list of card fields, including vague entries like 'use in projects built with AI agents'. It is information-dense but not well structured or skimmable.

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?

With no output schema, the description's enumeration of returned fields is exactly the right compensation and makes the payload predictable. The remaining gap is routing context versus the many sibling lookup tools, which is not addressed.

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?

Only one parameter and schema description coverage is 100%, so the baseline is already high. The description's concrete examples (React, GSAP, Zod, FastAPI, Phaser) reinforce that the identifier is a package/framework name rather than an ID, adding mild but genuine clarification beyond the schema.

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?

States a specific verb and resource ('The full AgentGid card of a library, framework or dev tool') and enumerates what the card contains, so the agent knows exactly what it fetches. However, it never distinguishes itself from the sibling find_tools, leaving the retrieve-one-vs-search-many boundary to inference.

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?

No when-to-use guidance at all: nothing says this is the follow-up call once a slug is known, nor when to prefer find_tools/find_apis/get_asset instead. The only implicit hint is that the single 'tool' parameter suggests lookup by known identifier.

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