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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=false and destructiveHint=false, so the safety profile is fully covered structurally. The description adds that prices are 'current' and specifies the units involved (Kredits, euros excluding VAT), which is useful context. It stops short of saying whether prices are static or volatile, or how the answer is formatted, so it earns a solid but not exceptional score.

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 sentence, front-loaded with the core subject ('Current prices of KrakenShield') and then the scope of what is priced. The parenthetical list is dense but every item conveys real scope. Minor awkwardness from the long trailing clause about Kredit packs, 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?

This is a simple, read-only, zero-required-parameter lookup with no output schema, and the description enumerates what will be returned, which is the main thing an agent needs. The only missing piece is any hint about the shape or freshness of the response, which is a small gap for a tool of this complexity.

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?

There is a single optional parameter, 'language', and the schema already documents it at 100% coverage including the enum values and default. The description adds nothing about language handling, which is acceptable given the schema does the work, so the baseline of 3 applies.

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 names the exact resource (KrakenShield prices) and enumerates the covered items: audits (SSL/TLS and surface, privacy, code analysis, penetration test), awareness training and certification, plus Kredit pack pricing. An agent immediately knows this is a pricing lookup rather than a security check like the sibling check_ssl. It does not explicitly contrast with siblings, but the subject matter 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?

Usage is only implied by the resource name — an agent infers 'call this when the user asks about prices or costs'. There is no explicit when-to-use statement, no mention of alternatives, and no note on whether this should be combined with other KrakenShield tools. Adequate but with a clear gap.

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