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

The description adds two behavioral facts the annotations do not cover: the Pro-plan requirement and that public links survive the rename. Combined with idempotentHint=true and destructiveHint=false, an agent has a good picture. It stops short of saying what happens on a name collision or whether the old path becomes invalid.

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 very short sentences: eligibility gate first, action second, side-effect reassurance third. Nothing is wasted and the most decision-relevant constraint is front-loaded.

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, non-destructive rename with a fully documented schema and no output schema, the description covers the essentials. Minor gaps remain around error cases (folder not found, duplicate name), which for a metadata mutation would be worth one more sentence.

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%, with both parameters documented including examples and the explicit note that new_name is not a path. The description adds nothing further about parameters, so the baseline 3 applies.

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 and resource ("Renames a folder"), which cleanly separates it from rename_file and other siblings in the list. It is clear about what changes, though it doesn't explicitly contrast itself with the file-renaming sibling.

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?

"Pro plan only" is a genuinely useful eligibility prerequisite that tells the agent when the call will fail. However, there is no guidance on when to use this versus move_file or create_folder, and no mention of preconditions such as the folder needing to exist.

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