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. The description adds real value beyond that: deterministic newest-first ordering, the exact field set each row returns, a transcript-availability flag, and which value to forward to get_transcript.

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 tight sentences: ordering first, then filtering dimensions, then the return shape and handoff. No filler and nothing important is buried.

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 carries the return-value burden and does so by enumerating row fields and the transcript flag. Paging is left to the schema's limit/offset descriptions, which is reasonable, though the absence of any note about total or result-set size keeps it just short of fully complete.

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 all six parameters are already documented, and the description largely restates them ('filter by keyword, by source, and by free text'). It does sharpen the mental model of the search_in scope (titles, Twitter Space transcripts, or both) but adds no format, boundary, or interaction detail not already in 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 resource and scope ('Recorded search results, newest first') and makes clear this reads a stored history rather than performing a live search — a distinction not obvious from the name alone. It also names the downstream sibling get_transcript and the field (broadcast_id) that connects them, so an agent can place it in the workflow immediately.

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 filtering dimensions (keyword, source, free text across titles/transcripts) imply when the tool is appropriate, and the get_transcript handoff hints at the next step. However, no sibling is named as an alternative and there is no explicit when-not guidance, e.g. that source values come from list_sources or keyword ids from list_keywords (that appears only in the schema).

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