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

readOnlyHint=true already declares the safe read-only profile, so the description only needs to add context. It does disclose the return content (relation type names plus ids), which is useful given there is no output schema, but says nothing about pagination behavior or result size limits beyond what the schema field descriptions already state.

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?

One tightly packed sentence with the purpose, examples and the downstream consumer front-loaded; no wasted words. It is perhaps overly compressed, since the sibling disambiguation is left implicit.

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 simple two-parameter read-only lookup with a fully described schema, the description covers what the tool returns and why an agent would call it. Nothing further is required to invoke it correctly.

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 100% and both paging parameters are fully documented in the schema, including the next_page hint. The description adds no parameter-level meaning, so the baseline 3 applies.

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: listing dependent relation types (with Japanese term 続柄 and concrete examples) plus the ids returned. An agent can tell this is a lookup/enumeration tool, though it never explicitly distinguishes itself from the similarly named sibling smarthr_list_dependents.

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?

"needed by smarthr_create_dependent" gives a concrete when-to-use condition and names the consuming tool. It stops short of stating when not to use it or that smarthr_list_dependents is a different, unrelated listing.

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