pennylane_letter_lines

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

Annotations declare readOnlyHint=false, idempotentHint=false, destructiveHint=false and openWorldHint=true. The description adds the operational constraints an agent needs: lines must share the same account (e.g. 411xxx), and the default requires total debit = total credit. It does not say how to reverse the operation, which is the main remaining gap.

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?

Four short sentences, front-loaded with what the tool does, then the use case, then constraints. No filler, though the parenthetical 'rapproche' is a minor redundancy with 'lettre'.

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 an output schema present, the description needn't explain returns. It covers purpose, use case, account constraint and balance default, which is nearly everything needed; the only omissions are the reversibility path and the account-type restriction for other account classes.

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 schema already documents both parameters, but the description adds meaning to allow_partial by explaining the default balancing rule (total debit = total credit) that the flag relaxes.

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: lettering (reconciling) entry lines with each other, and clarifies the practical goal of matching invoices to payments. An agent can distinguish this from unletter_lines, but the description does not name the sibling it is complementary to.

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 implied usage context ('permet de pointer des factures avec des règlements') and prerequisites (same account, balanced by default), but never explicitly says when to prefer this over unletter_lines or list_lettered_lines, nor when not to use it.

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