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

Annotations already declare readOnlyHint=false and destructiveHint=true, so the write nature is known. The description adds valuable behavioral context: an approval workflow, approval-mode semantics, auto-creation routing via a sibling, and explicit instruction not to re-ask after the first clear request. It does not explain the destructiveHint implication, but the annotation covers that flag.

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 front-loaded with the core purpose, followed by use cases, routing, and approval behavior. It is slightly longer than necessary, especially the approval bracket, but every sentence conveys operationally relevant guidance and no content is wasted.

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?

Given two fully documented parameters, a clear routing rule, approval guidance, and examples, the description is complete for an agent to call this tool correctly. No output schema exists, but the return value is not essential for deciding when or how to invoke the tool.

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%, and both 'name' and 'companyId' are already well described in the input schema. The description reinforces nesting via 'partners/acme' but adds no meaning beyond the schema, so the baseline score of 3 is appropriate.

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 ('Create a folder in the knowledge base for organizing files') and gives concrete use cases and nesting examples. It also names the sibling alternative, save_knowledge, that can auto-create folders, so an agent can distinguish this tool's role without ambiguity.

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 Routing section explicitly says folders auto-create via save_knowledge(folder: ...) and that this tool should only be called to pre-create an empty folder. It also provides operational guidance about approval tiers, when to call, and not to re-ask, making when-to-use and when-not-to-use clear.

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