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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds a small content-shape hint (readings "explained line by line," "read a passage at a time"), but it offers no behavioral detail about permissions, framing, or error handling beyond that.

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 first two sentences redundantly echo the title, and the third is one long promotional run-on listing the app's content rather than being front-loaded on the tool's action. Little of the text earns its place for an agent deciding whether and how to call the tool.

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 one-parameter, idempotent read tool with full schema coverage and an output schema absent, the description is minimally adequate. However, it never states what is returned for a reading versus a plan, leaving a gap for a tool whose title explicitly promises "one reading or plan."

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%, and the sole id parameter is fully documented in the schema (id from list_readings or a plan name like "japji"). The description adds no syntax or format meaning beyond that, 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 largely restates the title ("One reading or plan, line by line") and then describes the Stoic Scroller product as a whole, not the specific action of retrieving one reading by id. It never states a clear verb+resource like "retrieve a single reading or plan by its id," and it does not distinguish this tool from siblings such as stoics_list_readings or stoics_search_readings, which it only vaguely gestures at.

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 when-to-use guidance. The mention of "plans, search, and the whole Meditations" hints at other capabilities but never tells the agent to prefer this tool for a single id-based fetch versus stoics_search_readings or stoics_get_today. The agent must infer usage entirely from the tool name.

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