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

No annotations are supplied, so the description carries the full burden. It implies a read call but says nothing about whether the principle is randomly chosen, drawn from a fixed catalog, paginated, or what the response contains; only the data source is disclosed.

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?

A single efficient sentence with the core action front-loaded and the source detail placed where it aids interpretation. Nothing is padded, though the brevity contributes to the semantic gaps noted elsewhere.

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 annotations, no output schema, and two undocumented optional parameters, the definition is thin for a tool whose return shape and selection logic are unknown. An agent would know what to call but not what it will receive or how the principle is chosen.

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%, and the description only gestures at 'topic' without examples, valid values, or default behavior when omitted. The 'language' parameter and its 12-value enum go entirely unmentioned, so the description fails to compensate for the coverage gap.

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 pairs the verb 'Get' with a specific resource ('a Stoic principle') and names its source ('dayStoic.com's monthly themes'). It is distinguishable from siblings like today_quote or daily_reflection, though it doesn't explicitly contrast itself with them.

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?

The phrase 'optionally selected by topic' tells the agent that filtering is optional, but there is no guidance on when to use this versus today_quote or daily_reflection, nor on what topics are valid. The agent is left to infer usage context entirely.

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