log

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

With no annotations, the description carries the full burden. It discloses the non-obvious behavior that the first line of body becomes the title, which is valuable. However, it does not explain side effects, permissions, or how the session log is affected beyond appending, so transparency is partial.

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?

Two short sentences with no filler. The main action is front-loaded, and the key title-extraction behavior is stated in the second sentence, which earns its place.

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 two-parameter logging tool with an output schema, the description covers the required body behavior and leaves tags inferable. It is nearly complete, though a note on when to use logging vs. other tools would make it fully self-contained.

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 must add meaning. It explains the semantics of the required body parameter (first line serves as title), but says nothing about the optional tags parameter. The name 'tags' is self-explanatory, so this is acceptable but not complete.

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 a specific action (append) and resource (session log entry), making the tool's purpose immediately clear. It is distinct from sibling tools like write/update which imply modifying data, whereas this tool logs entries.

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?

No guidance is given about when to use this tool instead of write/update/read_all/search. There are no conditions, exclusions, or alternative suggestions, leaving the agent to infer use from the tool name alone.

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