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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false and openWorldHint=true, so the safety frame is covered. The description adds genuinely new behavior: one generation is consumed from the daily allowance, a draft Post is written to the library, and the new Post id is consumable by schedule_post and export_to_tap. It stops short of stating what happens on a retry or a failed generation given the non-idempotent hint, which is the remaining gap.

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?

Three tight sentences, front-loaded with the side effect and return value. Every clause carries load: the content_id contract with schedule_post and export_to_tap and the allowance cost are both facts an agent would otherwise have to discover by trial.

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?

There is no output schema, so the description takes on the burden and discharges it by naming both return values (Jack text and new Post id). Combined with the quota note and the dry-run routing, nothing an agent needs to invoke this correctly is missing.

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 coverage is 100%, so the baseline is 3 and the schema already documents every parameter including enums. The description adds meaning the schema does not: the Story must be *owned*, and generation runs against the saved voice and output controls, which contextualizes voice_overrides and style beyond their field-level text.

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 and resource chain: creates a Jack from an owned Story, applies saved voice/output controls, and persists it as a draft Post. It also names the sibling it is not (generate_post_dry_run), so an agent can distinguish the two without opening either schema.

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?

Gives an explicit alternative and the exact condition that selects it: use generate_post_dry_run only when you want the text without a library entry. It also discloses that both paths cost the same daily allowance, removing the most likely wrong-selection motive.

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