dubbing_target_transcript_segments_update

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

Annotations already declare readOnlyHint=false, openWorldHint=true, idempotentHint=false and destructiveHint=false, so the safety profile is covered. The description's one additive fact -- that the call spends ElevenLabs credits -- is genuinely useful context not present in the annotations. However, it says nothing about whether the operation is synchronous, triggers re-dubbing, or why non-idempotency matters for credit consumption.

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?

It is short, but the two clauses are jammed into one unpunctuated string ('Segments Spends ElevenLabs credits'), which reads as a formatting defect rather than deliberate brevity. The cost warning should be its own sentence, front-loaded or clearly separated.

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 non-idempotent mutation that consumes credits and has no output schema, the description is too thin: it does not say what the update affects, whether it kicks off regeneration or a new dub, or what the caller should expect on success. The credit warning is the only substantive content.

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%: project_id, language_id, and the segments map (with the 1-500 entry bound) are all documented in the schema itself. The description contributes nothing about parameter meaning. Per the high-coverage baseline, 3 is the correct score.

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 largely restates the tool name ('Update Dubbing Target Transcript Segments' vs. dubbing_target_transcript_segments_update) without adding a verb+resource explanation an agent couldn't already infer. The only new information is the trailing credit-cost note. It also fails to distinguish this from the very similar sibling dubbing_target_transcript_segment_update (singular) or dubbing_transcript_segments_update.

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 prerequisites, and no mention of alternatives despite several near-identical siblings (segment vs. segments updates, regenerate, transcript_get). The agent must guess whether to use this bulk update or the single-segment variant.

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