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

Annotations already declare readOnlyHint=true, so safety is covered and the description is not required to re-state it. It does add useful behavior beyond the annotations: the underlying call is GET /forms/{identifier}/entries.json, filters are mapped onto Wufoo's Filter1/Filter2 wire format, and the response shape (field API IDs plus EntryId, DateCreated, CreatedBy, DateUpdated, UpdatedBy) is described for a tool with no output schema. No auth or rate-limit detail, but nothing is contradicted or misleading.

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?

Two dense sentences, front-loaded with the resource and its keying scheme, then the alternative pointer, then the raw endpoint. Every clause carries information (keying, filter syntax, sort, paging cap, sibling routing, endpoint) with no filler or repetition.

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 an 8-parameter read tool with no output schema, the description covers the essentials: what comes back (field API IDs plus system columns), how to filter/sort/page, and where to go for the title-keyed alternative. Return-value information is present precisely because no output schema exists, and the read-only annotation handles the safety dimension.

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 100%, so the baseline is 3 and the schema carries the per-parameter burden. The description adds meaning on top: it shows the concrete filter wire syntax ('Filter1=Field105 Contains foo, combined with match AND/OR') and confirms paging limits and sort-by-field-ID semantics in prose, which helps the agent compose correct calls rather than just read field docs.

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?

States a specific verb+resource ('List a form's submitted entries') with concrete scope details: keyed by field API ID plus system fields, filterable like the Entry Manager, sortable, paginated. It explicitly names the sibling it is not (wufoo_get_labeled_entries), so an agent can distinguish it from the title-keyed variant and from the count/list_report siblings without opening a schema.

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?

Gives an explicit routing rule: use this tool when entries should be keyed by field API ID, and use wufoo_get_labeled_entries when human field titles are wanted. It also states the operative mechanics (Filter1=Field105 Contains foo with AND/OR, sort by any field ID, page with pageStart/pageSize max 100), which tells the agent how to apply the tool rather than merely what it is.

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