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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description still contributes non-obvious behavior: a hard result ceiling ('Up to 100 properties') and a source limitation ('Public appraisal-district records only'), which explains why a known property might be absent. It does not discuss pagination, ordering, or what happens when no other properties exist, but with rich annotations and an output schema this is a solid contribution.

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?

Three short sentences, front-loaded with the input anchor followed by what is returned and the coverage caveats. The only wasted token is 'Read-only', which duplicates the readOnlyHint annotation; everything else 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 two-parameter read tool with full schema coverage, rich annotations and an output schema, the description covers the seed input, the returned content, the result cap, and the data-source boundary. Nothing an agent needs to decide whether and how to call it is missing.

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%, so the parameter baseline is 3. The description adds real meaning by clarifying that lead_id identifies a source property ('Given one property's lead_id') rather than an owner — a distinction the field name alone obscures — and it restates the 100 cap on limit that the schema enforces.

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 ('list') and a precisely scoped resource ('other Dallas County and Collin County properties held by the same owner of record'), and names the returned payload (tax-delinquent flags and balances). It also fixes the input anchor (one property's lead_id), which distinguishes it from siblings such as find_entity_owner or filter_properties without needing to open their schemas.

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 prerequisite is implied ('Given one property's lead_id'), so an agent knows it needs a seed property, and 'Public appraisal-district records only' signals a data-coverage boundary. However, there is no explicit when-to-use vs when-not guidance and no sibling is named as the alternative (find_entity_owner is an obvious candidate for owner-centric lookups). Usage is inferable but not directed.

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