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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds only that results are tool page links over a bounded catalog; it says nothing about result ordering, whether queries are fuzzy or exact, or what an empty result looks like — gaps annotations cannot fill.

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?

Two tight sentences: purpose and catalog scope first, return value second. No filler, though the parenthetical category list is slightly long for the value it adds.

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 simple two-parameter read-only search with no output schema, the description covers what it does and what it returns (a page link). It is still incomplete on the things an agent must guess: query semantics and the effect of max_results.

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 0%, so the description must carry parameter meaning and does not: neither `query` (free-text? category? tool name?) nor `max_results` (cap 15, defaults unknown) is mentioned. Only the word 'Find' loosely hints at what `query` accepts, leaving `max_results` entirely undocumented in both schema and description.

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+resource ('Find a free online tool on CodeKitHub'), scopes the catalog with concrete categories, and discloses the return value ('the tool page link'). It lacks sibling differentiation: the siblings are all concrete tools (calculate_age, hash_text, etc.), and the description never explains that this is the discovery entry point relative to them.

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 discovery framing implies when to use it — when you don't yet know which CodeKitHub tool you need — but nothing is stated explicitly. There is no mention of when not to use it, and no instruction to then invoke the specific sibling tool it surfaces.

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