Append content to Markdown section

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

With no annotations, the description carries the full disclosure burden. It does communicate non-destructive behavior and placement ('at the end of the matched section'), but it omits edge-case behavior such as selector-match failures, whether the file is created if missing, or formatting/line-break handling.

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 short and front-loaded with the core action. However, the third sentence ('Content is added at the end of the matched section') repeats the placement detail from the first sentence, creating mild redundancy.

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 three-parameter tool with no output schema, the description covers the essential usage and placement. It does not describe success/error responses or what happens when the selector does not match, but the schema already documents all parameters clearly.

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%, so the baseline is 3. The description references 'section' and 'content' but adds no parameter semantics beyond what the schema already provides for file, selector, and content.

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 ('Appends new content'), a resource ('Markdown section'), and positional behavior ('after the last item'), clearly distinguishing append from sibling write/delete tools. The title is consistent and unambiguous.

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 description gives explicit use cases ('add a new task, log entry, or note') and explains the intended effect ('without disturbing existing content'). It does not mention when not to use the tool or explicitly route to a sibling, so it stops short of full exclusion guidance.

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