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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds only that the schedule and TypeScript source are included in the payload; it says nothing about access requirements, error behavior, or size limits of the returned source.

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 short sentences, front-loaded with the action and the returned payload, with zero filler. Nothing could be removed without losing information.

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?

A simple two-parameter read with full schema documentation, an output schema, and complete annotations; the description says enough for correct invocation. Only minor gaps remain (no mention of what happens if the cron id is stale or the job is disabled).

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 properties already document cron_id ("Cron id from projects_cloud_get", maxLength 80) and project_id (UUID of an owned project). The description only restates the cron id sourcing, adding no new meaning.

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?

"Read one cron job" gives a specific verb and resource, and the clause "including its schedule and TypeScript source" clarifies what content is returned, separating it from write siblings like projects_cloud_cron_update or projects_cloud_cron_run. It never explicitly contrasts itself with a sibling by name, so it stops just short of 5.

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?

The singular "one cron job" implies this is the single-item read path, but there is no explicit when-to-use / when-not-to-use guidance or named alternative. "Use the id from projects_cloud_get" is a parameter-sourcing hint rather than usage routing.

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