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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safe-read profile is covered. The description adds useful value by disclosing the return shape (sector, type, services, live URL, case-study URL), which matters since there is no output schema. It says nothing about pagination, ordering, or volume of projects returned.

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?

A single compact sentence with no filler, and the subject (the portfolio) is front-loaded. It is a noun fragment rather than a sentence, which slightly weakens the framing of the action.

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, zero-required-parameter, read-only listing tool with no output schema, the description is nearly sufficient -- it effectively substitutes for the missing output schema by naming the returned fields. Only the absence of any routing guidance against its many siblings leaves a gap.

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% -- the single lang enum parameter is fully documented in the schema, including its default and the instruction to match the user's language. The description contributes nothing about parameters, so 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?

The description identifies the resource clearly ("Portfolio of Hilo Studio" projects) and enumerates the fields each entry carries, so an agent knows what it gets back. However, the verb is only implied -- it never explicitly says it lists all projects nor distinguishes this from siblings like hilo_find_relevant_work or hilo_studio_overview.

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?

There is no when-to-use guidance and no reference to any alternative. With eleven siblings including hilo_find_relevant_work (project lookup) and hilo_studio_overview, the agent gets no help deciding when to call this one instead.

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