Set track cover

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

The annotations already declare destructive, non-idempotent, and open-world behavior. The description adds valuable operational constraints beyond annotations: it replaces an existing cover, accepts only JPG/PNG, requires a local file, and enforces a 10 MB maximum.

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 a single, front-loaded sentence with no wasted words. The action and key constraints are immediately visible.

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 two-parameter mutation tool with rich annotations and no output schema, the description covers the essential behavior: what it does, ownership scope, source file type, local-file requirement, and size limit. It is nearly complete, though track_id semantics remain implicit.

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%, with image_path already described as an absolute path in the schema. The description adds important semantics for image_path, including allowed formats and size limit, but it does not explain track_id beyond the implied ownership in 'own track'.

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 states a specific verb and resource: setting or replacing the cover of an own track. It also distinguishes the action from siblings like remove_track_cover and copy_track_image by specifying that the source is a local JPG or PNG file.

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 description gives useful context for when this tool applies: only for an own track and only from a local JPG or PNG file. However, it does not explicitly name alternatives such as copy_track_image or remove_track_cover, nor does it state when not to use this tool.

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