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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states that the tool is free, lists what it returns, and specifies that fees are in lamports, but it does not explicitly state that the operation is read-only, whether authentication is needed, or what rate limits may apply. For a zero-parameter informational tool this is adequate but not rich.

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 a single, front-loaded sentence that immediately states the primary resource and expands into the specific data returned. The 'Free — no payment required' clause is short and adds useful context without bloat.

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?

Given the tool's low complexity, zero parameters, absence of annotations, and lack of an output schema, the description provides enough detail about what is returned: supported networks, on-chain programs, and exact rent + fee figures in lamports. Nothing essential for an agent to call this informational tool correctly is 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?

The tool has zero parameters, so there are no parameter semantics to explain. Per the baseline for parameterless tools, a 4 is appropriate; the description does not need additional parameter guidance.

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 uses a specific verb, 'List,' and names the exact resource: Solana networks supported by the API, on-chain programs, and the rent + fee table in lamports. It clearly distinguishes itself from generic chain tools by focusing on Solana and launch costs, though it does not explicitly contrast itself with siblings such as chain_networks or sol_launch_plan.

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?

Usage is implied by the purpose: an agent can infer this is the tool for discovering supported Solana networks and launch cost details. The description adds that it is free with no payment required, which is helpful context, but it does not explicitly state when to use this tool versus alternatives like chain_networks or sol_launch_plan.

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