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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered. The description adds genuine context beyond that: the analysis is 'bounded,' terminates at goal/drop-off/truncation, and the anonymous preview is restricted to synthetic read-only demo data with sign-in required for real projects — useful auth and data-scope disclosure.

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 compact sentences, front-loaded with the core purpose before the usage hint and the environment/auth caveat. Little waste, though the preview/auth sentence could be slightly tighter.

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 read-only analysis tool with full schema coverage and no output schema, the description covers scope, termination behavior, and auth/data limitations adequately. It stops short of clarifying return structure or how results relate to sibling funnel/retention tools, but nothing critical to invocation 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 description coverage is 100%, so all seven parameters are already documented in the schema. The description's mention of 'bounded' and 'truncation' loosely relates to max_steps and candidate_session_cap but adds no format or syntax detail. Baseline 3 is 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 gives a specific verb and resource: 'bounded session path analysis from entry pages to goal, drop-off, or truncation.' It clearly states the analysis type, though it does not explicitly distinguish itself from siblings like analytics_pages or analytics_sessions, which also deal with page/session behavior.

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 says it is 'useful for connecting page behavior to funnels, retention, and experiments,' which implies a usage context but never states when to prefer this tool over the named siblings (analytics_funnel, analytics_retention) or any when-not conditions. Usage is implied rather than directed.

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