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

No annotations exist, so the description carries the burden. It discloses that the tool returns static descriptive content (chain, links, supply, fee split) rather than live state, which is genuinely useful, but never states that it is read-only, side-effect free, or whether the data is static versus fetched live.

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 dense enumerative sentence plus a one-line next-step pointer. It is front-loaded on the resource identity and every clause maps to a distinct returned section, though the long comma list is denser than ideal for scanning.

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 must preview the return contents, and it does so by naming each section (game, loop, chain, links, collection, economy). For a zero-parameter, zero-annotation info tool this is essentially sufficient; only the static-vs-live nature of the data is left ambiguous.

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 the baseline is 4; there are no parameter semantics to document and the description correctly spends no effort on them.

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 states the resource clearly ('What Spirit Cards is') and enumerates the exact content buckets returned: game, five-node loop, chain, links, collection tiers, and economy. It does not differentiate itself from siblings like get_collection_stats or get_mining_guide by scope, though the closing pointer partially covers the guide overlap.

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: this is the orientation/onboarding read, and the last sentence routes the agent forward ('Call get_mining_guide to start mining'). There is no explicit 'use this when...' statement or exclusion against other info-bearing siblings such as get_collection_stats or get_pool.

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