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

Annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=true, and openWorldHint=false, so the mutation/safety profile is covered structurally. The description adds the useful detail that the same call can detach a link from its folder, but says nothing about permission requirements, behavior when the folder is missing, or whether an unfiled link behaves differently.

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 lean sentence with the primary action front-loaded and the secondary 'remove' case appended. Nothing is wasted, though the trailing clause could have been made more explicit about how removal is triggered.

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 tool with fully documented schema and rich annotations, the description covers both operation modes sufficiently; no output schema is needed since the tool returns no meaningful payload. Minor gaps remain around folder-must-exist preconditions, but nothing an agent needs to call it is missing.

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 the important detail that folder_id="" removes the link from its folder. The description does not repeat or extend that semantics, so the schema is doing the semantic work and 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?

The description uses a specific verb+resource pair ('Move a link into a folder') and covers both directions of the operation, including removal. It is not explicitly differentiated from siblings such as update_link or add_link_tag, but the resource and action are distinct enough to separate it in practice.

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?

Usage is implied by the description: use it to file or unfile an existing link. There is no explicit guidance on prerequisites (a valid, pre-existing folder_id), no naming of alternatives like update_link, and no statement of when-not to use it.

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