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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, openWorld), so the bar is lower. The description usefully adds that these are Sepolia test properties with no real-world effect, which materially changes how an agent should treat the results. It omits pagination/capping behavior, keeping it from a 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?

Three short sentences, front-loaded with purpose. Slight redundancy: the second sentence restates the search action, and the third repeats "Sepolia" already named in sentence one.

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 9-parameter, all-optional list tool with rich annotations and full schema coverage, the description covers purpose, environment, and return shape. It omits any note on result fields or pagination semantics, but with no output schema and thorough parameter docs this is largely sufficient.

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 every parameter (limit, offset, region, ownedBy, hasLoans, minAcres, maxAcres, minScore, hasListings) is already documented in the schema. The description adds no extra parameter meaning, 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 ("Search tokenized real properties on the Fabrica protocol") and clarifies it returns a list rather than a single record, which implicitly separates it from the get_property sibling. It does not name any sibling explicitly, so it stops short of a 5.

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 filter-based framing ("matching the given filters") implies this is the discovery/browse tool, but there is no explicit when-to-use, when-not-to-use, or named alternative such as get_property for known IDs. Usage must be inferred.

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