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

Annotations already declare readOnly, idempotent and openWorld, so the safety profile is covered. The description still adds real behavioral value beyond them: it discloses that the link is a referral, that no price is returned, and that no order is placed. That is meaningful negative-capability disclosure, though it says nothing about response shape or link format.

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?

Three short sentences, front-loaded with the closure that motivates the tool, then what it returns, then what it does not do. No filler and no repetition of the schema.

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?

There is no output schema, so the description must describe the return value; it does so at a high level (a referral link to MiningRigRentals). For a two-parameter, effectively zero-input tool with read-only annotations, that is nearly sufficient, with only the link's exact form left unstated.

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 coverage is 100% and both parameters are documented as ignored ('Ignored: direct rentals are closed'), so the schema fully carries the semantics. The description adds no parameter-level detail beyond reinforcing that the tool is inert with respect to input.

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 outcome: it returns a disclosed referral link to Galaxy Mind hashrate on MiningRigRentals, and explicitly denies returning a price. That corrects the misleading name 'get_quote'. It stops short of naming the sibling it contrasts with (get_rental_quote), leaving the agent to infer which tool actually quotes a price.

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?

It establishes the triggering condition ('direct rentals from Galaxy Mind have closed') and implies this is the fallback path, but never names an alternative tool or says when not to call it. The 'gives no price' clause hints at a contrast with quote tools without routing the agent explicitly.

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