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

With no annotations, the description must carry the behavioral load; it does disclose 'No auth needed', which is genuinely useful and not otherwise derivable. Beyond that it only lists the returned data. For a zero-parameter, static read this is largely sufficient, but it does not explicitly state that the call is side-effect free or that the range is dynamic (price varies with demand/utilization) versus fixed.

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 dense sentence in list form — content first, auth note last. Every fragment carries information (range bounds, cap, credit packs). Minor deduction for the fragmentary 'Surgemesh prices:' opener instead of a declarative lead, but nothing is wasted.

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?

No output schema exists, so the description properly summarizes the returned fields (base price, dynamic range with multiplier bounds and $0.06 cap, credit packs). For a simple read-only pricing lookup with zero inputs, this is close to complete; only the meaning of the 0.8x–3x multiplier (what drives it) is left implicit.

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 no parameters, so there is nothing to disambiguate; the baseline of 4 applies. The description adds no parameter detail because none exists.

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?

Names the resource (Surgemesh prices) and enumerates exactly what data it exposes: base per-delivery price, dynamic range, credit packs. An agent can distinguish this from get_quote or get_usage by the fact that it returns static price structure rather than account-specific quotes or consumption. Lacks an explicit verb like 'retrieve', but the content scope is unambiguous.

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?

No statement of when to call this versus get_quote (a quote for a specific send) or get_topup_link / create_checkout_link. The agent must infer that this is a pre-purchase price reference. No exclusions or sequencing guidance is given.

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