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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and closed-world, so the safety profile is covered. The description adds ordering (newest first), the access-scope constraint, and an explicit return exclusion, but says nothing about pagination or how the total count relates to the page limit.

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 tightly packed sentences with the core scope and ordering front-loaded. The return-value clause is partly redundant with the output schema, but it earns its place by ruling out findings/session data.

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 an output schema present, return-shape documentation is not required, and the annotations cover safety. The description supplies access scope, ordering, filter options and return exclusions, leaving only pagination behavior and sibling routing 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 description coverage is 0%, so the description must carry the load, and it does: query is scoped to title search, status is a filter, limit caps results. The only gap is that limit's default (20) and max (50) are left to the schema to convey.

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?

Names a specific verb+resource (list tests) plus scope (workspaces the caller can access) and ordering (newest first), which is more than the title restates. It does not differentiate itself from siblings like get_test or list_test_blocks, so the agent must infer when to prefer this tool.

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?

States the optional narrowing knobs (query, status, limit) and rules out a class of use cases with 'does not return findings or session data.' However, it never names the alternative tool (get_test, list_test_blocks) or the condition that would select it, so routing guidance is only implied.

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