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

With no annotations provided, the description carries the full burden and does disclose auth behavior ('No authentication needed', 'Requires: nothing'), operational limits (55 s synchronous exec, 5 MB transfers), and supported runtimes. It does not mention whether results are static/cached or what the response shape is, but for a public reference tool this is solid disclosure.

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 content is a single dense run-on sentence crammed with per-tier CPU/RAM/disk figures and a trailing SDK advertisement. The tier table is data the tool itself should return, so much of the text does not 'earn its place' in a description, though it is front-loaded with the core tiers.

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 zero-parameter, no-output-schema informational tool, the description adequately conveys what the agent will get back: tier specs, pricing model, billing cadence, and execution limits. It is reasonably complete, with the only redundancy being tier data that likely duplicates the tool's own output.

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 tool takes zero parameters, so the baseline of 4 applies; there is no parameter surface that the description needs to explain beyond the schema.

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 makes clear this is an informational pricing/limits lookup for the sandbox service, enumerating the tiers and resource specs it covers. However, with many sandbox siblings (create_sandbox, get_sandbox, list_sandboxes, exec_command), it never explicitly distinguishes itself as the read-only pricing reference rather than an action on a sandbox.

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 explicit guidance on when to call this versus alternatives like list_plans or get_started, and no conditions or exclusions are stated. The only usage-adjacent note is 'Requires: nothing,' which describes prerequisites but not invocation context.

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