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

With no annotations provided, the description must carry the full behavioral disclosure burden. It reveals some behavior (returns name/best-for/tags, optional tag filtering, uses published price comparison) but does not explicitly state that this is a read-only operation, what happens when no filter is supplied, or what the output looks like.

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?

The description is short and avoids major padding, but its grammar is awkward and the opening phrase 'The options' does not add useful meaning. Clearer front-loading, such as 'Returns options...', would make it more effective.

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?

This tool has no annotations, no output schema, and no parameter descriptions, so the description needs to be more complete. It lists some output fields but omits parameter semantics, tag value formats, and behavior without a filter, leaving an agent unable to reliably construct a correct invocation.

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 must clarify the parameters. It only says the result can be 'optionally filtered by a tag value,' but it never explains which parameter is filterKey, which is filterValue, what values are accepted, or how the tag filter maps to both 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 names a specific resource (US field service/trades software options) and some returned fields (name, best-for, tags), plus an optional tag filter. However, it lacks an explicit verb and is phrased as a noun phrase ('The options...'), and it does not distinguish compare_options from siblings like compare_criteria or compare_table.

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?

No guidance is given about when to use this tool versus the sibling tools. The only usage hint is that filtering by a tag value is optional, but there is no mention of what filterKey/filterValue should contain or when one alternative is preferable.

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