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

Annotations already mark this as read-only and non-destructive, and the description adds meaningful behavior: all filters are optional and AND-combined, the query is case-insensitive, and it includes practitioner-synonym expansion with concrete examples. There is no conflict with 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?

Two dense sentences deliver all essential information with no filler. The primary filtering action and dimensions are front-loaded, and the synonym examples and no-argument equivalence are compact and useful.

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 search tool with four optional parameters, an output schema, and sibling comparison, the description covers filters, combination logic, synonym behavior, and the empty-argument case. No critical operational detail seems missing.

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 parameters are already documented individually. The description adds cross-parameter semantics that the schema does not, namely AND combination, optionality, case-insensitive matching, synonym coverage, and the effect of no arguments.

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 precise action—filter the how-to index—and lists the filtering dimensions: analysis family, tool, vertical, and text query. It distinguishes itself from list_howto_pages by noting that a no-argument call returns every page, and from get_howto_page by targeting the index rather than a single page.

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?

It explains when the tool is appropriate: filtering by optional criteria, with AND combination, and explicitly notes the no-argument case is equivalent to list_howto_pages. It stops short of explicitly instructing when to choose get_howto_page over this tool, though the sibling names make that distinction inferable.

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