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

Beyond the readOnly/idempotent/non-destructive annotations, it discloses fail-closed semantics ('missing evidence closes admission') and enumerates the returned fields (paid_admission, currency, operations, cost/margin metadata) despite no output schema. It also pre-empts a plausible misinterpretation by noting estimates and profile margins are not evidence of settled profitability.

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?

Return contents and the primary routing rule (use before skavio_estimate) are front-loaded, and no sentence is filler. The opening sentence is an unusually dense compound of jargon ('verified shared cost profile', 'paid-admission status'), which costs some readability against an otherwise tight definition.

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 no output schema, the description carries the return-value burden itself and does so by listing the four result groups plus metadata. The read-only, no-side-effect nature and the fail-closed admission rule are all covered, leaving no gap an agent needs filled before calling it.

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?

Zero parameters, so the schema alone is sufficient and the baseline would be 4. The description's 'Takes no arguments' restates what the schema already declares rather than adding meaning, so it earns no bump above baseline.

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 verb ('Read') and enumerates exactly what is read: operation aliases, per-operation availability, unit credit prices, and this connection's paid-admission status. It explicitly contrasts itself with skavio_capabilities (broader API) and skavio_pricing (general tariff), so an agent can separate it from the closest siblings without opening any 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 a concrete sequencing rule ('Use to choose an MCP operation before skavio_estimate') plus named alternatives and what each covers instead. It also states the negative case ('does not run work or spend credits'), which prevents misuse as an execution tool.

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