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

Annotations declare readOnlyHint=false and destructiveHint=false, and the description is consistent with that. It adds genuinely useful behavior beyond the annotations: that classes and styles are copied, and that the insertion shifts subsequent path indices, which is a non-obvious side effect an agent must plan around.

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 sentences, zero filler, with the core action front-loaded and the important caveat immediately after. Every clause 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 single-parameter mutation tool with no output schema and non-destructive annotations, the description covers the action, what is copied, and the path-shift consequence. It stops short of noting whether the new copy is selected or what path it receives, which would fully close the loop.

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 single targetPath parameter is already documented as coming from the most recent read_page. The description adds no format or syntax detail beyond the schema, so the baseline 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?

States a specific verb and resource ('Copy a component... and insert the copy right after it'), and the 'with its classes and styles' clause pins down exactly what duplication carries over. This clearly distinguishes it from add_section, edit_section, and move_section, which an agent could otherwise confuse it with.

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?

It gives an explicit post-condition workflow rule: 'call read_page before the next path-based edit' because 'Paths after it shift by one.' That is strong guidance about sequencing, though it never states when to prefer duplication over adding a fresh section, nor any preconditions.

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