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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is covered. The description adds genuine behavioral context by disclosing the return shape and that it is "compact" — i.e. a reduced payload rather than full page data. It does not say whether large pages are truncated or how deep the tree goes, which keeps it below 5.

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 zero filler; the capability statement comes first and the workflow hint second. Every clause carries information an agent can act on.

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?

With only two well-documented parameters, no nested objects, and no output schema, the description usefully compensates by describing what the tree contains. That makes the tool callable without guessing at the response, though truncation/depth behavior on large pages remains unaddressed.

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 coverage is 100%, and the schema itself carries the important guidance (site_id must come from list_sites, not a URL or post ID). The description adds nothing about either parameter, so the baseline 3 applies — the schema does all the work here.

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 names a specific verb and resource ("Gets a compact Elementor page tree") and enumerates the returned fields (element IDs, element types, widget types, text/style hints). This distinguishes it reasonably well from siblings such as get_page_data or get_element, though it never explicitly contrasts itself with them.

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?

"Start here before editing Elementor content" gives clear workflow positioning as the entry point preceding edit tools. It stops short of naming which sibling to use next or when this tool would be the wrong choice, so it is strong context rather than explicit when/when-not routing.

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