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

With no annotations, the description carries full burden. It transparently states what the tool returns at a high level (inputs, outputs, assumptions, tables) and it is safely implied to be non-mutating, but it does not explicitly say it performs no calculation or expose other behavioral traits such as read-only status or formatting of the description.

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 sentence, front-loaded with the subject, and every phrase contributes a distinct category of content. No redundancy or 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?

For a zero-parameter describe tool with no output schema, the description covers the essential content areas (inputs, outputs, assumptions, tables). It is slightly incomplete in not relating itself to calculate or clarifying that it is a read-only explanatory call, but the scope is simple enough that nothing critical is missing.

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?

There are zero parameters, so the schema fully documents the input surface and the baseline is 4. The description adds the content semantics of the tool without needing to document parameters.

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 identifies a clear verb (describe) and a specific resource (the calculator's inputs, outputs, assumptions, and tables). It is unambiguous that this is the informational companion to calculate, though it does not explicitly name that sibling or contrast itself with it.

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 wording implies this tool should be used to inspect the calculator's model before or instead of running it, and the mention of inputs/outputs/assumptions gives a clear context. However, there is no explicit when-to-use or when-not-to-use statement, nor any named alternative.

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