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

Annotations already declare destructiveHint=true, openWorldHint=true, readOnlyHint=false, and idempotentHint=false, so the agent knows this is a mutating, open-world operation. The description adds valuable operational context: it returns the sheet URL, consumes daily quota, and costs 1 token from the account's compute bucket. It stops short of clarifying overwrite behavior 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?

The description is front-loaded with purpose, then states the return value and cost implications in two short follow-up sentences. It is appropriately sized and avoids filler, though the first sentence is dense with artifact details.

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 destructive, open-world publish tool with no output schema, the description covers the key agent needs: what is published, that a sheet URL is returned, and the quota/token cost. It leaves some gaps around overwrite semantics and idempotency, but annotations already flag the destructive nature.

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%, so both id and scenario are already documented in the schema, including scenario's defaults. The description does not add syntax, format, or validation detail beyond what the schema provides, matching the baseline for high-coverage schemas.

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?

The description names a specific verb and resource: publishing a stored model into the signed-in user's Google Sheets, and lists the concrete artifacts produced (workbook, data tabs, charts). It is clearly distinguishable from generic publish siblings, but does not explicitly distinguish itself from sim_publish_app or sim_publish_compare.

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 intended use case is implied: publish a stored model to Sheets. However, the description says nothing about when to choose this over sim_publish_app, sim_publish_compare, or sim_my_sheets, nor does it state prerequisites or exclusions.

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