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

Annotations already indicate readOnlyHint=false, and the description adds that multiple transactions are created at once and that each item matches poupa_add_transaction's shape. It does not disclose batch-specific behavior such as atomicity, partial-failure handling, duplicates, or return value, so the information is minimally beyond annotations.

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 concise sentences that front-load the key purpose ('bulk') and the main constraint (required transactions[]). Every word earns its place, and no excessive or repeated information is present.

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 one-parameter, mutation tool with no output schema and coarse annotations, the description gives a usable but incomplete context. It confirms the bulk input shape but misses output/response format, potential batch size limits, and whether the operation is all-or-nothing. These are important gaps for an agent to know before invocation.

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 0%, so the description must compensate. It does state that transactions[] is mandatory and that each item follows the same shape as poupa_add_transaction, which helps but still leaves field-level semantics (e.g., date format, value meaning) to the reader to infer from the sibling tool or 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?

The description clearly states the tool's purpose: 'Cria várias transações de uma vez (bulk)' – a specific verb (creates), resource (transactions), and bulk scope. It also references the singular sibling poupa_add_transaction, which distinguishes it from the single-transaction tool.

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?

The description implies usage is for multiple transactions at once and notes transactions[] is required. However, it never explicitly says to prefer this tool over poupa_add_transaction when batching, nor does it provide when-not-to-use or alternative conditions.

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