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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds useful behavioral context by saying the result is an interactive card and that it behaves like get_region_info for the topic plus photos. It does not discuss empty results or output details, but the output schema exists.

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 front-loaded with the core action, followed by usage guidance and a useful comparison to avoid a bad web-search fallback. Every sentence adds value, and there is no redundant padding.

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 low-complexity, two-parameter read-only tool with full schema coverage and an output schema, the description is largely complete: it explains what is shown, when to use it, and how it relates to get_region_info. The main gap is that it does not address the nearby render_apartment_gallery sibling, which could matter for disambiguation.

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 both the topic and language parameters are already documented in the schema. The description reinforces the house/wellness/outside topic scope but adds no syntax or format details beyond what the schema provides, making the baseline 3 appropriate.

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 verb and resource: showing the property's official house photos as an interactive chat card. It distinguishes the tool from web image search and clarifies its relationship to get_region_info, but does not explicitly differentiate it from the sibling render_apartment_gallery.

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 a clear usage trigger: when the guest wants to SEE the house, sauna/wellness area, or building exterior, rather than using a web image search. It also names get_region_info as a comparable tool, but it does not explicitly state when to prefer render_apartment_gallery instead.

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