populate_diagram

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions 'Phase B stub,' which hints at incomplete implementation but does not explain what that means for the caller (e.g., may not be fully functional, could error). It also does not disclose side effects, permissions, or atomicity, which are important for a mutation tool.

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 a single sentence that is front-loaded with the core purpose. It is appropriately concise and wastes no words, though it may be too terse given the lack of supporting details in the schema or annotations.

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?

Given the tool's complexity (two parameters, no output schema details, no annotations) and the presence of sibling tools like add_symbol, the description is incomplete. It does not explain when to use this over add_symbol, what the output looks like, or how errors are handled, leaving critical context missing for an agent.

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 compensate, but it provides no details about diagram_id or element_ids beyond the schema titles. The agent is left to guess at formats, constraints, or how element_ids relate to the diagram, making this a significant 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 clearly states the verb 'add' and the resource 'multiple element symbols to a diagram,' which distinguishes it from sibling tools like add_symbol that likely add a single symbol. However, it does not elaborate on what constitutes an 'element symbol' or specify batch semantics, so it is clear but not fully precise.

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 no guidance on when to use this tool versus alternatives such as add_symbol, create_block, or move_symbol. It does not mention that this is a batch alternative to add_symbol or any conditions for its use, leaving the agent to infer from the name alone.

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