Decode Angel Number

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

Annotations already declare readOnlyHint, idempotentHint and non-destructive behavior, so safety is covered. The description adds genuinely useful behavioral context beyond that: a cost of 10 credits (Tier 1) and the shape of the result. However it says nothing about rate limits, error behavior for non-digit input, or whether results vary with context beyond output shape, leaving the middle ground.

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 core sentence is front-loaded and efficient, stating the action and the returned fields in one line. The remaining lines are structured metadata (group, endpoint, required param, cost), which are useful but slightly boilerplate rather than prose.

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 an output schema present, the description needn't enumerate return values, and the annotations cover the safety profile, so the essentials are there. But for a tool sitting among several similar angel-number endpoints, the absence of any routing guidance or input-format constraints leaves an agent guessing on edge cases.

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 0%, so the description carries the burden for both parameters. It conveys that 'context' is optional life context, which adds some meaning beyond the bare schema, but it never clarifies the 'sequence' constraints (digits only, 1-8 characters, max 8) nor what a 'life context' string should contain or how it affects interpretation.

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 (Decode) applied to a specific resource (a numeric sequence / angel number), and adds what the response contains (pattern classification, exact match, reduced single-digit meaning). It does not explicitly name or differentiate itself from the closely-related sibling tools such as astroway_esoteric_angel_numbers_number or _today, so the agent must infer the distinction from the word 'sequence'.

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?

There is no explicit when-to-use guidance and no mention of alternatives among the four angel-number siblings. The only implied guidance is that a 'life context' can optionally be supplied, which hints at the context parameter but does not route the agent between decode vs. lookup-by-number vs. today's angel number.

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