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

With no annotations, the description carries the burden and does disclose meaningful behavior: auth requirement (same bearer credential), that it returns a URL rather than the audio itself, the Ogg format, and the 'no audio for older calls' edge case. It stops short of describing the response shape (e.g. availability flag) or error behavior when no recording exists.

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?

Purpose is front-loaded in the first sentence, followed by operational detail and the edge case. No filler, though the semicolon-joined middle sentence is dense.

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 simple two-param, no-output-schema tool, the description covers the return concept, format, and the unrecorded case. Minor omissions around the exact response structure are acceptable given there is no output schema.

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, but it never explains what 'id' or 'workspaceId' refer to. An agent must infer that 'id' is the call id. The gap is not closed despite only two parameters.

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 + resource: 'Get recording availability and authenticated audio URL.' An agent can distinguish this from calls_get/calls_list because it names the recording artifact specifically.

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?

It explains how to consume the result (fetch URL with bearer credential, --output file) and notes the unrecorded edge case, but never says when to choose this over calls_get or other call tools. Usage is implied by the workflow rather than routed explicitly.

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