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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds useful scope context (only current jobs, per-account, compared against maxJobs), but says nothing about volume, pagination, or auth requirements.

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?

Two tight fragments with the scope front-loaded and no padding. The trailing 'GET /jobs' is marginal value for an agent but does expose the underlying endpoint, so it is not entirely wasted.

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 zero-param list tool with rich annotations, the description is nearly sufficient, but with no output schema present it never explains the response structure — which accounts appear, what fields each job carries, or whether results are bounded.

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?

The tool takes zero parameters and the schema is empty, so there are no parameter semantics to clarify; baseline 4 applies. The description's mention of per-account grouping and maxJobs does give shape to what would otherwise be an opaque call.

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 resource and scope: jobs currently running, broken down per account and measured against each account's maxJobs. The 'running now' framing distinguishes it from flowmusic_get_job (single job) and flowmusic_get_usage, though no sibling is named explicitly.

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 implied rather than stated — an agent can infer this is for checking live job status across accounts, but there is no explicit guidance on when to prefer it over get_job, list_accounts, or get_usage, and no exclusions are given.

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