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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds value by listing what the payload contains and that it reports errors/warnings and download eligibility, but omits whether the call fails or returns empty when INK4 has not been prepared, and leaves 'Scope view' undefined.

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 opening enumeration of return contents is dense but useful and front-loaded. However the trailing 'Argument: orgnr, year' merely repeats the schema, and 'Scope view' is an unexplained fragment that costs space without informing the agent.

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 no output schema, enumerating the response sections is the right move and largely done. Still missing for a domain-specific read tool are the precondition for INK4 data existing, the meaning of 'Scope view', and how the year argument maps to fiscal years.

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 50%: orgnr is well documented in the schema (10 digits, optional hyphen, pointer to list_companies) while year has no description. The text only restates 'Argument: orgnr, year' without clarifying whether year is the fiscal year label, calendar year, or how fiscal years spanning two calendar years are keyed.

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 (read) and resource (INK4) scoped to handelsbolag/kommanditbolag for one fiscal year, and enumerates the sub-sections returned (INK4R, INK4S, delägare, kontroller, downloadability). It is clearly distinguishable from generic siblings like read_tax or read_arsbokslut, though it never names them.

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?

Usage is only implied: the description tells you it applies to partnership INK4 for a fiscal year, but gives no explicit when-to-use versus read_tax/read_arsbokslut, no prerequisites (e.g. whether set_ink4_inputs must have run first), and no when-not-to-use guidance. 'Scope view' is asserted without explanation.

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