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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint false, so the safe/read-only nature is covered. The description adds useful context that each category holds roughly 10–50 templates, indicating complete listings, and explains the no-category behavior. This exceeds the baseline but doesn't cover pagination or default sort behavior (though the schema handles default).

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?

Three sentences with no filler. The first sentence front-loads the core purpose and key options; the second clarifies the no-category behavior; the third adds a helpful bounded-size note. Every sentence contributes.

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 read-only browse tool with three optional parameters, the description covers purpose, category behavior, sort modes, and an important completeness caveat. It doesn't discuss return shape, but that is acceptable given no output schema and the simplicity of the operation. It is slightly incomplete in not addressing the relationship to list_free_templates, but not a major gap.

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%, so the baseline is 3. The description's mention of categories and sort options largely mirrors the schema enum descriptions; it adds no deeper semantics about limit usage or default sort. It does clarify the 'no category' case, but the schema already states that.

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 states a specific action ('browse') and resource ('template catalog'), and explicitly notes it works without a keyword, which distinguishes it from the sibling search_templates. It also enumerates category types and sort modes, leaving little ambiguity about scope.

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 phrase 'without a keyword' gives a clear condition for using this tool rather than a keyword-based search (search_templates). It also explains the behavior of omitting category. However, it doesn't explicitly name alternatives such as search_templates or list_free_templates, and it doesn't state when not to use it, so it falls short of a full 5.

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