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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds value beyond that by naming the underlying endpoint (GET .../count.json) and declaring the response shape {EntryCount}, which the absent output schema would otherwise leave unknown.

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 compact clauses, front-loaded with the count operation, then the filter semantics, then the return shape and endpoint. No sentence is 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 simple read-only counting tool, the description covers purpose, filtering behavior, return shape, and the backing endpoint; with annotations covering safety and the schema fully documented, nothing needed to call it correctly 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?

Schema coverage is 100%, so the baseline is 3. The description adds meaning by clarifying that the filter set is optional ('all of them, or only those matching filters') and that filters follow the same format as wufoo_list_form_entries, which helps the agent reuse known filter conventions.

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 (count) and resource (a form's entries), plus the two modes: all entries or filtered. It is unambiguously distinguishable from the sibling wufoo_list_form_entries, which returns entries rather than a count.

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 a concrete use case ('Useful to plan paging') and points to wufoo_list_form_entries as the source of the filter format. It does not spell out when to prefer this over other count tools (e.g. wufoo_count_report_entries), but the context is clear.

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