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

No annotations are provided, so the description carries the full burden. It discloses data provenance (Cumulo's open Fibre Network Monitor, Mocha testnet, testnet TIA not mainnet price), trust semantics (namespace names are untrusted bytes chosen by the publisher), and the difference between aggregate and live per-account output. It does not mention read-only status or rate limits, but the read-only nature is strongly implied.

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 description is long but largely earns its place because there is no output schema and it must enumerate the rich return content. The purpose is front-loaded, followed by provenance, parameter guidance, and alternatives, though the first sentence is dense and could be split for readability.

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 complex, schema-rich aggregation tool with no output schema, the description covers purpose, returned data categories, data source and caveats, parameter usage, and sibling alternatives. Nothing critical for correct invocation appears to be missing.

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%, so the baseline is 3. The description adds meaning for the account parameter (live publisher blobs, namespaces, escrow deposits and withdrawals) and repeats the period options, but does not elaborate on chain, namespaces count, or publishers count beyond schema descriptions.

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 and scope: 'Who pays for Celestia Fibre blockspace and how much' with a detailed list of aggregates, publishers, namespaces, fees, and activity. It explicitly distinguishes itself from list_fibre_blobs and get_fibre_validator, so an agent can select it without opening the schema.

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?

Gives clear usage context: choose a period, optionally give an account for a live publisher view, and names two alternatives for related but distinct needs. It does not explicitly say when not to use this tool, but the alternatives and parameter guidance are sufficient for routing.

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