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

Annotations already declare readOnlyHint and openWorldHint; the description goes further by naming the upstream data sources (api.kaspa.org, rusty-kaspa release notes) and the two networks compared, so the agent knows the result depends on external endpoints. It also discloses the payment model (x402, $0.005 USDC per successful call, failures uncharged), which is essential behavioral context a schema cannot convey; it stops short of describing latency, caching, or what happens if the upstream or release notes are unreachable.

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 purpose is front-loaded in the first two sentences, which is good. The sibling-tool sentences are verbose and oddly formatted (e.g. 'when you need Detailed Kaspa block by 64-character hex hash: timestamp'), padding the description with detail the agent does not need to call this tool.

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?

With an output schema present, return values need not be explained, and the absence of parameters means no input guidance is needed. The description covers sources, networks, and cost, which is sufficient for a zero-argument status reader; only the interpretation of the comparison result (e.g. activated vs pending vs error states) 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 zero parameters, so there is no per-parameter meaning to add and the baseline of 4 applies. The description correctly does not invent inputs, and the network scope (mainnet and testnet-10) is fixed behavior rather than a configurable parameter, which is worth knowing.

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 resource (Kaspa Toccata hard fork status) and a specific mechanism: comparing live virtual DAA score from api.kaspa.org against official activation scores from rusty-kaspa release notes for mainnet and testnet-10. It names the relevant KIPs, making the scope unambiguous and clearly distinct from generic Kaspa DAG/block siblings.

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?

Explicitly routes the agent away from two siblings ('Related tools on this server, for a different need: crypto_kaspa_block ... crypto_kaspa_chain_color ...'), which clarifies intent by contrast. However, it never states the affirmative condition ('use this when you want to know if the fork has activated or how far away activation is'), and it does not address the many other kaspa_* siblings like crypto_kaspa_dag_state or crypto_kaspa_metrics_history.

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