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

With no annotations, the description carries the full load, and it delivers two genuinely valuable traits: 'Only the given fields change' establishes partial-update semantics, and the pause/delete note establishes reversibility. It omits permission requirements, error behavior, and whether changes take effect immediately, keeping it short of a 5.

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 sentences, front-loaded with the operation and its field-level effects, ending on the one strategic decision an agent faces. No filler and nothing redundant.

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 7-parameter mutation tool with no annotations and no output schema, the description covers the essential semantics: partial updates and the replace-wholesale behavior of tasks/tags (via 'replace'). It is arguably thin on auth/permission prerequisites and return behavior, which keeps it just below fully complete.

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 86%, so the schema already documents cron, tasks, tags, disabled, and the ids. The description maps fields to intents (cron=reschedule, disabled=pause/resume) but adds little syntax or meaning beyond the already-rich schema, 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?

States a specific verb (Change) and resource (a periodic job) and then enumerates the exact mutations possible: reschedule via cron, pause/resume via disabled, or replace tasks/tags/description. It also distinguishes itself from the sibling scrapy_cloud_delete_periodic_job by naming pause as the reversible alternative.

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?

Explicitly frames the pause case as the reversible alternative to deleting, which is real decision guidance against a sibling. However it gives no guidance relative to the other close siblings (create, get, list periodic jobs), so it is clear context rather than a complete when/when-not map.

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