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

Annotations already declare destructiveHint=true and readOnlyHint=false, so safety framing is covered. The description adds one genuinely useful signal beyond them: 'Replace' implies a full overwrite rather than a merge, so unspecified fields may be cleared. It stops there, with no confirmation, permission, or reversibility detail.

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?

A single economical sentence with the key semantics ('Replace') front-loaded after the verb. No padding, though there is essentially nothing else to it.

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?

An output schema exists so return values need no explaining, but for a destructive 7-parameter mutation with zero schema coverage the description is far too thin. It gives no per-field guidance and no warning about what replacement destroys.

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 0% across 7 parameters, so the description carries the full burden and mostly fails it. 'Editable fields' loosely maps to city/venue/region/country/countryCode and 'ownership scope' hints at teamId, but no parameter is named or explained.

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 (Replace) and resource (custom track), and the phrase 'editable fields and ownership scope' scopes what is updated. It implicitly distinguishes itself from create_custom_track/get_custom_track/delete_custom_track, though it never names them.

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?

No statement of when to use this versus create_custom_track, get_custom_track, or delete_custom_track, and no prerequisites or preconditions given. The agent must infer usage entirely from the name.

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