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

Annotations declare readOnlyHint=true and destructiveHint=false, so the safety profile is already known. The description adds useful behavioral context: each request returns different symbols from a 2,000+ database and includes full psychological meanings, going beyond what annotations state.

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 three sentences long and reasonably front-loaded with purpose. The use-case list in the second sentence is somewhat exhaustive, making it slightly less concise than it could be, but every sentence contributes value and it is not bloated.

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?

For a simple random-selection tool with no required parameters and no output schema, the description covers what it returns (dream symbols with full meanings), the scope (2,000+ database), and typical uses. It lacks explicit return-shape details, but that is not critical given the simplicity and the presence of an input schema.

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 100%, with clear explanations of count and compact. The description adds no new parameter semantics—'one or multiple' merely echoes the count parameter's schema. Since the schema carries the full burden, baseline 3 is appropriate.

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 clearly states the tool provides random dream symbols and interpretations, using strong verbs like 'Discover' and 'Get' tied to a specific resource. It is immediately distinguishable from siblings like get_dreams_symbols (specific listing) and get_dreams_symbols_id (single symbol) by emphasizing randomness.

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?

Provides clear use cases ('dream of the day features, dream journaling prompts, meditation on subconscious themes, or exploring what different dreams mean') but does not explicitly contrast with sibling tools like get_dreams_symbols. It implies when to use this tool but lacks alternative guidance.

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