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

The annotations already declare mutation, idempotency, and destructive potential, but the description adds useful context: the operation is durable, tenant-scoped, and does not alter folder contents. It could still say more about rename semantics such as collision handling, but it substantially clarifies the behavioral impact.

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 front-loaded sentence that states the action, scope, and key behavioral constraint with no wasted wording.

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?

The description covers the core rename behavior and safety context, and an output schema exists. However, it omits that the schema also supports changing color, and it leaves all parameter meanings unexplained, so an agent cannot fully understand invocation details from the description alone.

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%, so the description must carry parameter meaning. It only weakly implies a name via 'Renames' and an idempotency key via 'idempotent', while completely omitting the folderId format and the undocumented color parameter.

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: renames one tenant-owned media folder. It is clearly distinguishable from siblings such as rename_transcript, create_folder, delete_folder, and move_transcript_to_folder.

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?

It identifies the object type but gives no guidance on when to choose this tool versus related folder tools, nor any prerequisites such as needing an existing folderId or handling name conflicts. Usage is only implied by the tool name.

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