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

Annotations already declare readOnly/idempotent/non-destructive, so the safety profile is covered. The description adds genuinely new behavioral context: a 200-measure-per-call ceiling, a continuation hint embedded in the response, and the presence of repeat signs and tempo changes in the payload. It stops short of describing error or empty-track behavior.

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?

It is a single front-loaded sentence with no filler, and the core action leads. However, the run-on structure with 'from..to', stacked parentheticals, and garbled phrasing ('the answer's more says where to go on') makes it harder to parse than the content warrants.

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 spelled out, and the description nonetheless covers defaults, the call-size limit, continuation, and the shape of the returned measures. It is complete for a read tool, with only sibling routing left unaddressed.

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%, so from/to/track/draft are already documented in structured data, and the description mostly restates them ('from..to of a track', 'by id a previous tool gave'). It adds only the 200-cap default nuance, so the 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 concrete verb and resource ('Read measures from..to of a track of the draft') and even enumerates what comes back (id, time signature, voices, repeat signs, tempo changes). It is specific, but it never distinguishes this tool from the similar sibling read_my_score, so an agent cannot differentiate the two from the text alone.

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 states operational bounds ('all by default, 200 at most a call: past them, the answer says where to go on'), which is useful pagination guidance, but there is no explicit when-to-use or when-not-to-use against read_my_score, open_in_cesure, or list_my_scores. The agent must infer the selection criteria.

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