transcribe_url

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

With no annotations, the description carries the full burden and does well: it discloses that the server itself downloads the file, a 100 MB default limit tunable via SAIDWIRE_MAX_DOWNLOAD_MB, and that content is sent to an external service (Saidwire). It omits failure modes (timeouts, unsupported formats, non-audio content) which would matter for a network-dependent tool.

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?

Front-loaded with purpose, followed by operational constraints, then an Args block. The only waste is slight overlap between the opening sentence and the `url` arg line, which restates the same idea in shorter form.

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?

An output schema exists, so return values need not be described. For a 4-param network tool with no annotations, the description covers input rules, size limits, external transmission, and output formats; only error/edge-case behavior is absent.

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 0%, so the description must compensate, and it documents all four parameters with meaning beyond the schema: format values are explained (json carries word timestamps), include_words is scoped to text/json, and output_path is described as an optional absolute path for additionally saving. Minor gap: no guidance on required vs optional beyond what is obvious.

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?

Opening sentence gives a specific verb pair and resource: download a public audio file from an http(s) URL and transcribe it. The URL-versus-file distinction from the sibling transcribe_file is implied rather than stated, so an agent must infer the split from the parameter names.

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?

"Use a direct link to the audio, not a web page" is an explicit, actionable constraint that steers input selection. It does not, however, state when to prefer this over transcribe_file or what happens with non-public/authenticated URLs.

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