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Polymarket Arbitrage

polymarket_arbitrage
Read-onlyIdempotent

Find arbitrage opportunities on Polymarket via monotonicity violations + partition-sum checks. Call with NO args for a trending_scan of the top ~200 markets by weekly volume; pass event for the strongest per-event partition_check, or topic for a themed cross-event scan. event (recommended for a specific market): pass a Polymarket event slug like "fed-decision-may-2026" or "when-will-bitcoin-hit-150k"; walks child markets, checks date-axis / threshold-axis ordering AND computes the partition_check (sum of YES prices across mutually-exclusive legs — should ≈1; deviations >3pp emit a BUY/SELL EVERY LEG signal). topic (for cross-event scanning): pass a seed question like "Strait of Hormuz traffic returns to normal" or "Fed rate decision"; searches related events across the platform, flattens markets, runs the comparator on the union. Cross-event mode catches "...by May 31" vs "...by Jun 30" patterns that single-event misses. SEMANTIC ANCHOR: cross-event pairs require ≥0.30 Jaccard similarity on question tokens (prevents Powell-Fed-Pause being paired with Powell-DOJ-probe); skipped_low_similarity surfaces the rejected pair count. PARTITION FILTER: drops will-person-X / will-manager-Y / will-someone-else- placeholder slugs; partitions with >20% placeholder fraction return null arb signal. Response: opportunities[] (gap_pp, suggested_trade, reasoning, monotonicity violation context), and in event mode partition_check{sum_yes_prices, gap_from_1, placeholders_filtered, suggested_trade}. FILL CHECK: when the partition signal fires, arbitrage.fill_check prices it against live CLOB depth (theoretical_edge_pp_at_book vs realizable_edge_pp at 1000 shares/leg, thin_legs[]) — realizable_edge_pp ≤ 0 means the overround exists only at last-trade, not in the book; do not trade it. For custom sizing use polymarket_fill_risk.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
eventNoSingle-event mode (use this if you know the specific Polymarket event): event slug like "fed-decision-may-2026" or "when-will-bitcoin-hit-150k". Full Polymarket URLs also accepted.
topicNoCross-event mode (use this if you want to scan related events across the platform): a topic or seed question like "Fed rate decision" or "Strait of Hormuz traffic returns to normal". Tool searches Polymarket for related events and checks monotonicity across them.

TDQS

A4.8/5.0
Behavior5/5

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

Annotations declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint, and the description adds extensive context beyond these: it explains the algorithms, filters (Jaccard similarity, placeholder fraction), fill check mechanics, and response structure. No contradictions with annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is somewhat verbose with multiple paragraphs, but it is front-loaded with the main purpose and each sentence contributes value. For a tool with this complexity, the detail is justified, though a slightly more concise version could be possible.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description covers modes, algorithmic details, filters, and output structure comprehensively. However, it lacks explicit error handling or edge case descriptions, which slightly reduces completeness given the tool's complexity and lack of output schema.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Although the input schema already describes both parameters with 100% coverage, the description adds significant meaning: it explains the difference between event and topic modes, provides example slugs and seed questions, and describes the underlying logic, greatly enriching parameter understanding.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states 'Find arbitrage opportunities on Polymarket via monotonicity violations + partition-sum checks', specifying the verb, resource, and method. It distinguishes from sibling tools like polymarket_edges and polymarket_fill_risk by focusing on arbitrage detection using these specific algorithms.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides explicit guidance on when to use each mode: 'Call with NO args for a trending_scan', 'pass event...', or 'topic...'. It recommends event for specific markets, explains cross-event mode benefits, and directs users to polymarket_fill_risk for custom sizing, showing clear alternatives.

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

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TDQS

A3.8/5.0
Disambiguation2/5

Multiple tools have overlapping boundaries: ask_pipeworx and ask_pipeworx_beta are explicitly identical, ask_pipeworx_grounded and deep_research heavily overlap with them, and entity_profile, compare_entities, recent_changes, and validate_claim all circle the same company-data space. The prediction-market cluster (polymarket_edges, polymarket_edge_tracker, polymarket_arbitrage, polymarket_fill_risk, polymarket_kalshi_spread) also requires careful reading to distinguish. The descriptions help, but the set relies on them to disambiguate near-duplicates.

Naming Consistency4/5

Nearly all tools follow a consistent lowercase snake_case style, whether verb_noun (search_complexes, validate_claim, unsubscribe), noun_verb (entity_profile, recent_changes), or brand-like (ask_pipeworx, polymarket_edges). There is no camelCase mixing or chaotic verb style. Minor inconsistency exists between imperative verbs (remember, forget, subscribe) and noun-style names, but the overall pattern is readable and predictable.

Tool Count2/5

33 tools is well above the 25-tool 'heavy' threshold, and many are meta-tools (discover_tools, suggest_questions, pipeworx_feedback, pipeworx_trending, remember/recall/forget) that pad the surface. The server is named 'Complex Portal', yet only two tools serve that purpose—the rest belong to a broad data platform. The count feels inflated and misaligned with the server's stated identity.

Completeness3/5

For the broad Pipeworx data platform the surface is fairly complete: universal querying, grounded answers, deep research, entity profiles, comparisons, claim validation, subscriptions, memory, and feedback. For the Complex Portal domain named by the server, coverage is thin—just search and fetch-by-accession, with no browsing, species filtering, or cross-reference tools. The core workflow works, but the namesake domain is under-served relative to the rest of the set.