podcast_by_feed_url

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

Annotations already declare readOnly, idempotent, openWorld and non-destructive, so the safety profile is covered. The description adds nothing beyond purpose: no mention that Podcast Index credentials (api_key/api_secret) are required, no rate-limit or failure behavior for an invalid/nonexistent feed URL.

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 tight sentence with the resource and distinguishing lookup key front-loaded; efficient, though its brevity leaves the gaps noted elsewhere.

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 3-parameter tool with 0% schema coverage and no output schema or annotations explaining auth, the description should say that credentials are required and roughly what a feed-URL lookup returns. Neither is present, so an agent could invoke it without knowing how to authenticate.

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 carry the parameter burden. It only maps 'feed URL' to the url parameter; the api_key and api_secret credentials — a third of the parameters and a non-obvious requirement — are entirely unexplained in both schema and description.

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 verb ('Get') and resource ('podcast') plus the lookup key ('by feed URL'), which distinguishes it from a term-based podcast_search. It names the source ('Podcast Index') but does not explicitly contrast itself with the many podcast_* siblings.

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?

'by feed URL' implies the usage condition — you already have a feed URL rather than a search term — but no when-to-use/when-not guidance or named alternative (e.g. podcast_search) is given.

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