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

No annotations are present, so the description carries the full behavioral burden. It does add one meaningful trait ('value discarded'), implying no retention and no side effects, but it says nothing about permissions, reversibility, return values, or why nine wildly heterogeneous parameters exist. That is far short of what an un-annotated tool needs.

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?

Seven words, front-loaded, with no filler — but this is under-specification masquerading as conciseness rather than efficient communication. For a 9-parameter tool with no annotations and no output schema, a single terse phrase does not earn its brevity.

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?

Given nine optional parameters spanning unrelated domains (git ref, city, RSS feed, JSON, timezone, file path), no annotations, and no output schema, the description is grossly incomplete. It covers only the info: URI concept and leaves the meaning and relationship of the rest of the surface unexplained.

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 description coverage is 100%, so each of the 9 parameters is already documented in the schema and the baseline of 3 applies. The description adds no parameter-level meaning (e.g., why city, feed, json, and zone coexist under an 'info: URI' tool), but the schema already does the documenting.

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 description implies a shape/validation check on 'info:' URIs and states the value is discarded, which is a specific-enough verb+scope. However, the jargon ('info: URI namespace shape') is cryptic and it does nothing to distinguish itself from ~28 siblings like browser-url-ok, domain-shape, or normalize-url that all perform related URI checks.

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?

There is no when-to-use guidance, no conditions, and no named alternatives despite an extremely crowded sibling set of URL/shape tools. The agent is left to infer entirely when this applies versus the many near-identical options.

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