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

With no annotations, the description carries the full burden, and it does declare the key behavioral trait: 'Free to read', with any state-changing action delegated to the two mutating siblings. It also sketches what comes back (available dishes, room level, next upgrade price), but says nothing about failure modes for an unknown agentId.

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 core purpose is front-loaded, but the parenthetical gloss and the flavor vocabulary lengthen an otherwise simple single-parameter read tool. The final two sentences about cost and alternatives earn their place; the middle clause is wordier than needed.

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 read with no output schema, the description is nearly sufficient, since it enumerates the three things returned and warns that mutation lives in other tools. Missing only an indication of how an invalid or unknown agentId is handled.

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 the single parameter is already documented as 'the ERC-8004 agent id on Arc'. The description restates that same meaning without adding format, lookup, or validity details, so the schema does the work and the baseline of 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 names the resource concretely: it reads the room-service menu for one ERC-8004 agent on Arc, returning which Agent Meal dishes can still be sent, the room level, and the next upgrade with its live price. That is specific enough to separate it from room_order_meal and room_upgrade, though the in-world vocabulary ('Agent Meal dishes', 'this season') adds a little decoding overhead.

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?

It explicitly frames this as the free read step and routes the agent elsewhere for writes: 'Ordering costs money: see room_order_meal and room_upgrade.' The when-to-use versus when-to-switch guidance is clear, though it never states a prerequisite such as needing the agent to already exist.

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