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

Annotations already declare destructiveHint=true, readOnlyHint=false, and idempotentHint=false, so the mutating nature is covered. The description adds real value beyond them: it discloses that P0-P2/renderer/originality/immutable-version gates rerun and that credentials are never placed in URLs or echoed in errors. It still omits what 'upload' overwrites or how rerun failure is surfaced.

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 sentences, front-loaded with the action and its precondition, then credential handling. Dense but each sentence carries distinct information; no filler.

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?

No output schema exists, and the description does not say what a successful upload returns or how gate failures are reported, which matters for a destructive nested-object mutation. It adequately covers the credential path and gate behavior but leaves the result contract unspecified.

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 50%: the credential param is documented in the schema, but the required 'draft' object is not. The description partly compensates by characterizing the payload as 'original preflighted source JSON' and clarifying the credential is private, but adds no structure or format detail for the nested draft object.

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 (upload) and resource (original preflighted source JSON), and clarifies it is the source JSON rather than a published artifact. It is mostly distinguishable from siblings like publish_game and preflight_create, though it never names them to remove ambiguity.

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?

Implies a precondition by saying the JSON must already be 'preflighted', which is useful routing information. However, it never states explicitly when to use this versus publish_game or prepare_create, so the when-to-use guidance is only implied.

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