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

The annotations declare readOnlyHint=true, but the description says 'Maps any new accounts first,' which implies the tool may modify account mappings. That is a material side effect inconsistent with a read-only annotation, so the description contradicts the structured safety profile.

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?

The description is compact and front-loads the core question, followed by trigger phrases and a scope caveat. The phrase 'Maps any new accounts first' is useful but conflicts with the read-only framing, making the structure slightly less clean than it could be.

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 read-only status tool with no output schema, the description covers the main checks (mapping/review status, balance checks) and clearly bounds the scope away from T2 preparation or filing. The missing piece is clarification of the mapping side effect and its interaction with readOnlyHint.

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?

The input schema has 100% description coverage for both optional parameters, including company selection and fiscal year end. The description adds no parameter-level detail beyond the schema, so the baseline of 3 is appropriate.

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 states a specific verb and resource: checking whether the GIFI is ready for the T2, which accounts are unmapped or need review, and whether balance checks pass. It also distinguishes this from adjacent tools such as get_trial_balance and get_accounts_status by naming the T2 Schedule 100/125 context.

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 trigger phrases ('is my GIFI ready', 'GIFI mapping', 'T2 schedule 100 / 125') give clear usage context, and the final sentence clarifies that the tool prepares the GIFI trial balance rather than filing the T2. It does not explicitly say when to choose this over siblings like get_accounts_status or get_reconciliation_status, so it stops short of a 5.

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