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

Annotations already cover readOnly=false, idempotent=true, destructive=false, so safety is declared. The description adds genuinely new context: a per-call price ($0.001, free on failure) and the 'only when empty' guard on archiving, which explains why archiving is not destructive. It doesn't say what permissions are needed or what happens to items in a non-empty location.

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?

One tight sentence covering both modes plus a short cost clause. The capability is front-loaded and no sentence is filler.

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?

No output schema and no param descriptions, so the description is the only prose the agent gets, and it covers modes, preconditions and cost. Missing: explicit statement of which field identifies an existing location and what the tool returns, both of which matter for a 0%-coverage mutation 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 0%, so the description has to carry parameter meaning, and it largely does: rename maps to new_name, describe maps to description, archive maps to archived, and name is the target. It never states that name is the required identifier of the existing location during updates, which is the one inference left to the agent.

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?

Specific verb set (add / rename / describe / archive) against a concrete resource (location), with examples of what a location is (warehouse, shop, van). An agent can immediately tell this is the create-and-mutate tool rather than the read tool inventory_locations.

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?

Both modes are spelled out: create when no such location exists, modify when renaming, describing or archiving. The precondition 'only when empty' for archiving is a real routing constraint. It stops short of explicitly naming inventory_locations as the read alternative or stating what to do when a rename target already exists.

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