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

Annotations already establish readOnly, idempotent, non-destructive and closed-world behavior, so the safety profile is covered. The description adds genuinely useful behavioral context by enumerating the returned payload and, importantly, flagging that the transcript is only present 'quando disponível', which tells the agent the field may be absent. No pagination or error behavior is mentioned.

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 sentence that front-loads the core purpose and then lists the payload contents without filler. Every element earns its place and nothing is repeated from structured fields.

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 usefully compensates by listing the returned fields, and both parameters are fully documented in the schema. For a simple two-parameter read tool this is nearly sufficient; only the absence of any usage routing or edge-case behavior keeps it from 5.

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% and both required slug parameters are documented there, so the schema does the heavy lifting. The description adds no format, resolution or example details for podcast_slug or episode_slug beyond what the schema already states. Baseline 3 applies.

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 names a specific resource (a podcast episode) and enumerates exactly what the payload covers: audio URL, excerpt, guests, topics, cited links and transcript. The retrieval verb is only implicit in the noun phrase 'Detalhe completo', but the resource is unmistakable and clearly distinct from list_podcast_episodes. It falls short of 5 only because it never explicitly contrasts itself with the list 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?

Usage is only implied: an agent can infer this is the detail counterpart to list_podcast_episodes and that it needs both slugs. There is no statement of when to reach for this versus list_podcast_series or search, and no prerequisites or exclusions are given.

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