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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds the meaningful constraint that only "final merged" transcripts of "completed" workflows are returned, implying this is not a live/partial read. It does not say what happens on an incomplete or failed workflow, which is the main behavioral unknown for a read tool with annotations present.

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?

A single front-loaded sentence with no filler; the scope constraint and format options are packed in without redundancy. Nothing could be removed without losing information.

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?

The tool is simple, has an output schema (so return shape need not be described), and annotations cover safety, so the core is present. The remaining gap is failure behavior for unfinished workflows and any note on when md/json differ in content — small but relevant for correct invocation.

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 0%, so the description must compensate. It does so for the format parameter by enumerating txt/json/md, which the schema does not (format has no enum). For workflow_id it adds only the implicit "must reference a completed workflow" context, leaving the identifier's provenance undocumented.

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 gives a specific verb and resource ("Download the final merged transcript") plus a scope qualifier ("of a completed workflow") and enumerates output formats. It is clearly distinguishable from siblings like transcription_get_quality_report or transcription_get_workflow, though it never names them explicitly.

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 "of a completed workflow" implicitly tells the agent this only applies after a workflow finishes, which is useful context. However, there is no explicit when-not guidance, no mention of what to do while a workflow is still running, and no pointers to the sibling that supplies the workflow state.

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