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

Annotations only declare it is a non-readonly, non-idempotent, non-destructive mutation; the description goes far beyond that. It discloses the 72-hour deletion clock, that the tool returns a link plus short code to hand the person, that the connection stops working afterward, and that reconnection happens once signed in with the same data. Error-branch behavior (not_unclaimed, claim_with_cli and its key replacement) is also spelled out.

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?

Front-loaded with the core purpose, then layered with the 72-hour rationale, mechanics, and error cases in a logical order. Every sentence carries new information, but the run-on error-code sentence is dense enough that a slightly tighter phrasing would read better.

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?

Despite having no output schema, the description fully covers what the caller receives (link + code), what happens to the connection afterward, and the two failure paths. For a zero-parameter tool in an otherwise unrelated sibling set, this is complete.

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?

The tool takes zero parameters, so per the baseline rule a 4 applies; there is nothing for the schema to describe and nothing for the description to compensate for. Note the 'link and short code' described are outputs delivered to the person, not call arguments, so no parameter meaning is missing.

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?

Opens with a specific verb+resource: 'Keep the LakehouseBox account this connection set up for the person.' An agent immediately knows this converts a temporary trial account into a permanent one, a purpose with no overlap with any sibling (describe_table, query, etc.). The follow-on clauses reinforce rather than obscure the purpose.

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?

Explicitly states when to call it ('when the person wants to keep their data, or when the time left is short') and when it does not apply, naming two distinct negative cases with their returned codes ('not_unclaimed', 'claim_with_cli'). Alternatives are routed (CLI claim path). Nothing is left to inference.

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