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

Annotations already declare readOnlyHint=false and destructiveHint=false, so the 'WRITE:' prefix and the POST endpoint add essentially nothing an agent did not already know. The description says nothing about ordering/append behavior of sections, whether the proposal must be in a draft state, or whether the new section is immediately client-visible — all real concerns for this mutation.

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 short clauses, front-loaded with the write semantics and zero filler. The raw endpoint string is arguably redundant for an agent that only needs the tool name, but it costs little and confirms the REST operation.

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 4-required-parameter mutation with no output schema and no annotations rich enough to cover side effects, the description should say what comes back (a new section id?) and any state prerequisites. It covers intent and target resource but leaves the agent guessing about the effect and result of the call.

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 75%: description, proposal_id, and sectiontype carry their own schema explanations including the opening-first / closing-last rule. Only 'name' is undocumented, and it is constrained (1–300 chars). The description's 'text section' phrasing does signal that fee content is not accepted here, a small addition over the schema, so the baseline 3 holds.

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 and resource: 'add a text section to a proposal', scoped to opening or closing. The 'WRITE:' prefix and endpoint reinforce it is a mutation. It does not explicitly separate itself from the similar-sounding siblings bidsketch_create_section (template-level section) or bidsketch_update_proposal_section, leaving an agent to infer the distinction from the name.

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?

There is no when-to-use / when-not-to-use guidance and no mention of alternatives, despite three sibling tools touching sections. The only usage-shaped information ('as an opening or closing section') duplicates what the sectiontype enum already says in the schema rather than helping the agent choose this tool.

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