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

Annotations already declare it is a non-read-only, non-destructive, non-idempotent, closed-world write, so safety is covered. The description adds the RAG grouping semantics, but with no output schema it never says what the call returns (presumably a collection id needed by the follow-up calls it recommends) or that duplicate names fail.

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?

Two sentences, no filler: the first defines the action, the second gives the follow-up tool names. Front-loaded and every clause earns its place.

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 simple three-parameter create tool with full schema coverage and no output schema, the description covers purpose, concept, and next steps well. The only real gap is the return value/handle that downstream calls require, which the description leaves 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 description coverage is 100% and each of the three parameters carries its own description (name uniqueness, optional description, workspace scoping), so the schema already does the work. The description adds no parameter-level information beyond the schema, making the baseline 3 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?

States a specific verb and resource ("Create a named knowledge collection") and immediately explains the domain concept ("Collections group files for RAG search"), which separates it from sibling mutators like collections_add_file or collections_assign_agent that operate on an existing collection.

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?

Gives explicit workflow sequencing: after creating, add files via add_file and attach agents via assign_agent. What's missing is any when-not guidance (e.g., that a collection must exist before the add/assign calls), but for a single-purpose create tool the routing is clear.

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