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

Annotations already declare read-only, idempotent, non-destructive, closed-world behavior, so the description correctly spends its words elsewhere: it discloses pagination ('One page of submissions'), nullable fields (submitted_at, subscriptions, vote_score 'null when Steam has not reported them'), and a shared cache/ordering model with the /workshop page. The '/workshop page' reference is a bit opaque to an agent with no web context.

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?

Purpose is front-loaded in the first sentence, with field documentation following. The field list is dense but each item carries real semantic payload (including the `/skins/{itemdefid}` cross-reference); the run-on structure with nested parentheticals makes it slightly harder to scan.

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?

With no output schema, the description appropriately takes on the return-shape burden by enumerating every field and its meaning, including nullability and the accepted_itemdefid-to-/skins linkage. What is missing is modest: total page counts / whether pagination end is signaled, and explicit filter-combination behavior.

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% with enums and examples for all six params, so the schema does the heavy lifting and the baseline of 3 applies. The description's filter mention is generic and does not add format or interaction detail (e.g., how search and target combine) beyond the schema.

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 ('Browse or search Workshop submissions') and immediately clarifies the unit of return ('One page of submissions'). No sibling tool covers Workshop submissions, so the absence of explicit sibling differentiation costs little, but the dual 'browse or search' framing is not resolved into distinct modes.

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?

'Browse or search' plus the filter list implies usage, and the pointer to '/workshop/targets' for valid target values is a useful routing hint. However, there is no explicit statement of when to prefer this over related tools or what happens with an over-long/empty search, leaving selection mostly inferential.

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